Energy dependence of ϕ meson production at forward rapidity in pp collisions at the LHC

The production of $\phi$ mesons has been studied in pp collisions at LHC energies with the ALICE detector via the dimuon decay channel in the rapidity region $2.5< y < 4$. Measurements of the differential cross section $\mathrm{d}^2\sigma /\mathrm{d}y \mathrm{d}p_{\mathrm {T}}$ are presented as a function of the transverse momentum ($p_{\mathrm {T}}$) at the center-of-mass energies $\sqrt{s}=5.02$, 8 and 13 TeV and compared with the ALICE results at midrapidity. The differential cross sections at $\sqrt{s}=5.02$ and 13 TeV are also studied in several rapidity intervals as a function of $p_{\mathrm {T}}$, and as a function of rapidity in three $p_{\mathrm {T}}$ intervals. A hardening of the $p_{\mathrm {T}}$-differential cross section with the collision energy is observed, while, for a given energy, $p_{\mathrm {T}}$ spectra soften with increasing rapidity and, conversely, rapidity distributions get slightly narrower at increasing $p_{\mathrm {T}}$. The new results, complementing the published measurements at $\sqrt{s}=2.76$ and 7 TeV, allow one to establish the energy dependence of $\phi$ meson production and to compare the measured cross sections with phenomenological models. None of the considered models manages to describe the evolution of the cross section with $p_{\mathrm {T}}$ and rapidity at all the energies.publishedVersio

ϒ production in p–Pb collisions at sNN=8.16 TeV

ϒproduction in p–Pbinteractions is studied at the centre-of-mass energy per nucleon–nucleon collision √sNN=8.16TeV with the ALICE detector at the CERN LHC. The measurement is performed reconstructing bottomonium resonances via their dimuon decay channel, in the centre-of-mass rapidity intervals 2.03 &lt;3.53and −4.46 &lt;−2.96, down to zero transverse momentum. In this work, results on the ϒ(1S) production cross section as a function of rapidity and transverse momentum are presented. The corresponding nuclear modification factor shows a suppression of the ϒ(1S) yields with respect to ppcollisions, both at forward and backward rapidity. This suppression is stronger in the low transverse momentum region and shows no significant dependence on the centrality of the interactions. Furthermore, the ϒ(2S) nuclear modification factor is evaluated, suggesting a suppression similar to that of the ϒ(1S). A first measurement of the ϒ(3S) has also been performed. Finally, results are compared with previous ALICE measurements in p–Pbcollisions at √sNN=5.02TeV and with theoretical calculations

<math><mrow><msup><mi>K</mi><mo>*</mo></msup><msup><mrow><mo>(</mo><mn>892</mn><mo>)</mo></mrow><mn>0</mn></msup></mrow></math> and <math><mrow><mi>ϕ</mi><mo>(</mo><mn>1020</mn><mo>)</mo></mrow></math> production in <math><mi>p</mi><mtext>-</mtext><mi>Pb</mi></math> collisions at <math><mrow><msqrt><msub><mi>s</mi><mrow><mi>N</mi><mi>N</mi></mrow></msub></msqrt><mo>=</mo><mn>8.16</mn><mo> </mo><mi>TeV</mi></mrow></math>

International audienceThe production of K*(892)0and ϕ(1020)resonances has been measured in p-Pb collisions at sNN = 8.16 TeV using the ALICE detector. Resonances are reconstructed via their hadronic decay channels in the rapidity interval −0.5 &lt; y &lt; 0 and the transverse momentum spectra are measured for various multiplicity classes up to pT = 20 GeV/c for K*(892)0and pT = 16 GeV/c for ϕ(1020). The pT-integrated yields and mean transverse momenta are reported and compared with previous results in pp, p-Pb and Pb-Pb collisions. The xT scaling for K*(892)0and ϕ(1020)resonance production is newly tested in p-Pb collisions and found to hold in the high-pT region at Large Hadron Collider energies. The nuclear modification factors (RpPb) as a function of pT for K*0 and ϕ at sNN = 8.16 TeV are presented along with the new RpPb measurements of K*0, ϕ, Ξ, and Ω at sNN = 5.02 TeV. At intermediate pT (2–8 GeV/c), RpPb of Ξ, Ω show a Cronin-like enhancement, while K*0 and ϕ show no or little nuclear modification. At high pT (&gt;8 GeV/c), the RpPb values of all hadrons are consistent with unity within uncertainties. The RpPb of K*(892)0and ϕ(1020)at sNN = 8.16 and 5.02 TeV show no significant energy dependence

Safety of hospital discharge before return of bowel function after elective colorectal surgery

Background Ileus is common after colorectal surgery and is associated with an increased risk of postoperative complications. Identifying features of normal bowel recovery and the appropriateness for hospital discharge is challenging. This study explored the safety of hospital discharge before the return of bowel function. Methods A prospective, multicentre cohort study was undertaken across an international collaborative network. Adult patients undergoing elective colorectal resection between January and April 2018 were included. The main outcome of interest was readmission to hospital within 30 days of surgery. The impact of discharge timing according to the return of bowel function was explored using multivariable regression analysis. Other outcomes were postoperative complications within 30 days of surgery, measured using the Clavien-Dindo classification system. Results A total of 3288 patients were included in the analysis, of whom 301 (9 center dot 2 per cent) were discharged before the return of bowel function. The median duration of hospital stay for patients discharged before and after return of bowel function was 5 (i.q.r. 4-7) and 7 (6-8) days respectively (P &lt; 0 center dot 001). There were no significant differences in rates of readmission between these groups (6 center dot 6 versus 8 center dot 0 per cent; P = 0 center dot 499), and this remained the case after multivariable adjustment for baseline differences (odds ratio 0 center dot 90, 95 per cent c.i. 0 center dot 55 to 1 center dot 46; P = 0 center dot 659). Rates of postoperative complications were also similar in those discharged before versus after return of bowel function (minor: 34 center dot 7 versus 39 center dot 5 per cent; major 3 center dot 3 versus 3 center dot 4 per cent; P = 0 center dot 110). Conclusion Discharge before return of bowel function after elective colorectal surgery appears to be safe in appropriately selected patients

Study of very forward energy and its correlation with particle production at midrapidity in pp and p-Pb collisions at the LHC

Abstract The energy deposited at very forward rapidities (very forward energy) is a powerful tool for characterising proton fragmentation in pp and p-Pb collisions. The correlation of very forward energy with particle production at midrapidity provides direct insights into the initial stages and the subsequent evolution of the collision. Furthermore, the correlation with the production of particles with large transverse momenta at midrapidity provides information complementary to the measurements of the underlying event, which are usually interpreted in the framework of models implementing centrality-dependent multiple parton interactions.Results about very forward energy, measured by the ALICE zero degree calorimeters (ZDCs), and its dependence on the activity measured at midrapidity in pp collisions at $$\sqrt{s}$$ s = 13 TeV and in p-Pb collisions at $$\sqrt{s_{\mathrm{NN}}}$$ s NN = 8.16 TeV are discussed. The measurements performed in pp collisions are compared with the expectations of three hadronic interaction event generators: PYTHIA 6 (Perugia 2011 tune), PYTHIA 8 (Monash tune), and EPOS LHC. These results provide new constraints on the validity of models in describing the beam remnants at very forward rapidities, where perturbative QCD cannot be used.</jats:p

( )Measurement of Prompt D-0, Lambda(+)(c), and Sigma(0,++)(c) (2455) Production in Proton-Proton Collisions at root s=13 TeV

none1021siThe p(T)-differential production cross sections of prompt D-0, Lambda(c)+, and Sigma(0,++)(c) (2455) charmed hadrons are measured at midrapidity (vertical bar y vertical bar < 0.5) in pp collisions at root s. = 13 TeV. This is the first measurement of Sigma(0,++)(c) production in hadronic collisions. Assuming the same production yield for the three Sigma(0,++)(c) isospin states, the baryon-to-meson cross section ratios Sigma(0,+,++)(c)/D-0 and Lambda(+)(c)/D-0 are calculated in the transverse momentum (p(T)) intervals 2 < p(T) < 12 and 1 < p(T) < 24 GeV/c. Values significantly larger than in e(+)e(-) collisions are observed, indicating for the first time that baryon enhancement in hadronic collisions also extends to the Sigma(c). The feed-down contribution to Lambda(+)(c) production from Sigma(0,+,++)(c) is also reported and is found to be larger than in e(+)e(-) collisions. The data are compared with predictions from event generators and other phenomenological models, providing a sensitive test of the different charm-hadronization mechanisms implemented in the models.noneAcharya, S.; Adamova, D.; Adler, A.; Adolfsson, J.; Rinella, G. Aglieri; Agnello, M.; Agrawal, N.; Ahammed, Z.; Ahmad, S.; Ahn, S. U.; Ahuja, I; Akbar, Z.; Akindinov, A.; Al-Turany, M.; Alam, S. N.; Aleksandrov, D.; Alessandro, B.; Alfanda, H. M.; Alfaro Molina, R.; Ali, B.; Ali, Y.; Alici, A.; Alizadehvandchali, N.; Alkin, A.; Alme, J.; Alt, T.; Altenkamper, L.; Altsybeev, I; Anaam, M. N.; Andrei, C.; Andreou, D.; Andronic, A.; Angeletti, M.; Anguelov, V; Antinori, F.; Antonioli, P.; Anuj, C.; Apadula, N.; Aphecetche, L.; Appelshaeuser, H.; Arcelli, S.; Arnaldi, R.; Arsene, I. C.; Arslandok, M.; Augustinus, A.; Averbeck, R.; Aziz, S.; Azmi, M. D.; Badala, A.; Baek, Y. W.; Bai, X.; Bailhache, R.; Bailung, Y.; Bala, R.; Balbino, A.; Baldisseri, A.; Balis, B.; Ball, M.; Banerjee, D.; Barbera, R.; Barioglio, L.; Barlou, M.; Barnafoldi, G. G.; Barnby, L. S.; Barret, V; Bartels, C.; Barth, K.; Bartsch, E.; Baruffaldi, F.; Bastid, N.; Basu, S.; Batigne, G.; Batyunya, B.; Bauri, D.; Alba, J. L. Bazo; Bearden, I. G.; Beattie, C.; Belikov, I; Hechavarria, A. D. C. Bell; Bellini, F.; Bellwied, R.; Belokurova, S.; Belyaev, V; Bencedi, G.; Beole, S.; Bercuci, A.; Berdnikov, Y.; Berdnikova, A.; Bergmann, L.; Besoiu, M. G.; Betev, L.; Bhaduri, P. P.; Bhasin, A.; Bhat, M. A.; Bhattacharjee, B.; Bhattacharya, P.; Bianchi, L.; Bianchi, N.; Biernat, J.; Bilandzic, A.; Biro, G.; Biswas, S.; Blair, J. T.; Blau, D.; Blidaru, M. B.; Blume, C.; Boca, G.; Bock, F.; Bogdanov, A.; Boi, S.; Bok, J.; Boldizsar, L.; Bolozdynya, A.; Bombara, M.; Bond, P. M.; Bonomi, G.; Borel, H.; Borissov, A.; Bossi, H.; Botta, E.; Bratrud, L.; Braun-Munzinger, P.; Bregant, M.; Broz, M.; Bruno, G. E.; Buckland, M. D.; Budnikov, D.; Buesching, H.; Bufalino, S.; Bugnon, O.; Buhler, P.; Buthelezi, Z.; Butt, J. B.; Bysiak, S. A.; Caffarri, D.; Cai, M.; Caines, H.; Caliva, A.; Calvo Villar, E.; Camacho, J. M. M.; Camacho, R. S.; Camerini, P.; Canedo, F. D. M.; Carnesecchi, F.; Caron, R.; Castellanos, J. Castillo; Casula, E. A. R.; Catalano, F.; Sanchez, C. Ceballos; Chakraborty, P.; Chandra, S.; Chapeland, S.; Chartier, M.; Chattopadhyay, S.; Chattopadhyay, S.; Chauvin, A.; Chavez, T. G.; Cheshkov, C.; Cheynis, B.; Barroso, V. Chibante; Chinellato, D. D.; Cho, S.; Chochula, P.; Christakoglou, P.; Christensen, C. H.; Christiansen, P.; Chujo, T.; Cicalo, C.; Cifarelli, L.; Cindolo, F.; Ciupek, M. R.; Clai, G.; Cleymans, J.; Colamaria, F.; Colburn, J. S.; Colella, D.; Collu, A.; Colocci, M.; Concas, M.; Balbastre, G. Conesa; del Valle, Z. Conesa; Contin, G.; Contreras, J. G.; Coquet, M. L.; Cormier, T. M.; Cortese, P.; Cosentino, M. R.; Costa, F.; Costanza, S.; Crochet, P.; Cuautle, E.; Cui, P.; Cunqueiro, L.; Dainese, A.; Damas, F. P. A.; Danisch, M. C.; Danu, A.; Das, I; Das, P.; Das, P.; Das, S.; Dash, S.; De, S.; De Caro, A.; de Cataldo, G.; De Cilladi, L.; de Cuveland, J.; De Falco, A.; De Gruttola, D.; De Marco, N.; De Martin, C.; De Pasquale, S.; Deb, S.; Degenhardt, H. F.; Deja, K. R.; Dello Stritto, L.; Delsanto, S.; Deng, W.; Dhankher, P.; Di Bari, D.; Di Mauro, A.; Diaz, R. A.; Dietel, T.; Ding, Y.; Divia, R.; Djuvsland, O.; Dixit, D. U.; Dmitrieva, U.; Do, J.; Dobrin, A.; Doenigus, B.; Dordic, O.; Dubey, A. K.; Dubla, A.; Dudi, S.; Dukhishyam, M.; Dupieux, P.; Dzalaiova, N.; Eder, T. M.; Ehlers, R. J.; Eikeland, V. N.; Eisenhut, F.; Elia, D.; Erazmus, B.; Ercolessi, F.; Erhardt, F.; Erokhin, A.; Ersdal, M. R.; Espagnon, B.; Eulisse, G.; Evans, D.; Evdokimov, S.; Fabbietti, L.; Faggin, M.; Faivre, J.; Fan, F.; Fantoni, A.; Fasel, M.; Fecchio, P.; Feliciello, A.; Feofilov, G.; Fernandez Tellez, A.; Ferrero, A.; Ferretti, A.; Feuillard, V. J. G.; Figiel, J.; Filchagin, S.; Finogeev, D.; Fionda, F. M.; Fiorenza, G.; Flor, F.; Flores, A. N.; Foertsch, S.; Foka, P.; Fokin, S.; Fragiacomo, E.; Frajna, E.; Fuchs, U.; Funicello, N.; Furget, C.; Furs, A.; Gaardhoje, J. J.; Gagliardi, M.; Gago, A. M.; Gal, A.; Galvan, C. D.; Ganoti, P.; Garabatos, C.; Garcia, J. R. A.; Garcia-Solis, E.; Garg, K.; Gargiulo, C.; Garibli, A.; Garner, K.; Gasik, P.; Gauger, E. F.; Gautam, A.; Ducati, M. B. Gay; Germain, M.; Ghosh, P.; Ghosh, S. K.; Giacalone, M.; Gianotti, P.; Giubellino, P.; Giubilato, P.; Glaenzer, A. M. C.; Glassel, P.; Goh, D. J. Q.; Gonzalez, V; Gonzalez-Trueba, L. H.; Gorbunov, S.; Gorgon, M.; Gorlich, L.; Gotovac, S.; Grabski, V; Graczykowski, L. K.; Greiner, L.; Grelli, A.; Grigoras, C.; Grigoriev, V; Grigoryan, A.; Grigoryan, S.; Groettvik, O. S.; Grosa, F.; Grosse-Oetringhaus, J. F.; Grosso, R.; Guardiano, G. G.; Guernane, R.; Guilbaud, M.; Gulbrandsen, K.; Gunji, T.; Gupta, A.; Gupta, R.; Guzman, S. P.; Gyulai, L.; Habib, M. K.; Hadjidakis, C.; Halimoglu, G.; Hamagaki, H.; Hamar, G.; Hamid, M.; Hannigan, R.; Haque, M. R.; Harlenderova, A.; Harris, J. W.; Harton, A.; Hasenbichler, J. A.; Hassan, H.; Hatzifotiadou, D.; Hauer, P.; Havener, L. B.; Hayashi, S.; Heckel, S. T.; Hellbar, E.; Helstrup, H.; Herman, T.; Hernandez, E. G.; Herrera Corral, G.; Herrmann, F.; Hetland, K. F.; Hillemanns, H.; Hills, C.; Hippolyte, B.; Hofman, B.; Hohlweger, B.; Honermann, J.; Hong, G. H.; Horak, D.; Hornung, S.; Horzyk, A.; Hosokawa, R.; Hristov, P.; Hughes, C.; Huhn, P.; Humanic, T. J.; Hushnud, H.; Husova, L. A.; Hutson, A.; Hutter, D.; Iddon, J. P.; Ilkaev, R.; Ilyas, H.; Inaba, M.; Innocenti, G. M.; Ippolitov, M.; Isakov, A.; Islam, M. S.; Ivanov, M.; Ivanov, V; Izucheev, V; Jablonski, M.; Jacak, B.; Jacazio, N.; Jacobs, P. M.; Jadlovska, S.; Jadlovsky, J.; Jaelani, S.; Jahnke, C.; Jakubowska, M. J.; Jalotra, A.; Janik, M. A.; Janson, T.; Jercic, M.; Jevons, O.; Jonas, F.; Jones, P. G.; Jowett, J. M.; Jung, J.; Jung, M.; Junique, A.; Jusko, A.; Kaewjai, J.; Kalinak, P.; Kalweit, A.; Kaplin, V; Kar, S.; Uysal, A. Karasu; Karatovic, D.; Karavichev, O.; Karavicheva, T.; Karczmarczyk, P.; Karpechev, E.; Kazantsev, A.; Kebschull, U.; Keidel, R.; Keijdener, D. L. D.; Keil, M.; Ketzer, B.; Khabanova, Z.; Khan, A. M.; Khan, S.; Khanzadeev, A.; Kharlov, Y.; Khatun, A.; Khuntia, A.; Kileng, B.; Kim, B.; Kim, C.; Kim, D.; Kim, D. J.; Kim, E. J.; Kim, J.; Kim, J. S.; Kim, J.; Kim, J.; Kim, J.; Kim, M.; Kim, S.; Kim, T.; Kirsch, S.; Kisel, I; Kiselev, S.; Kisiel, A.; Kitowski, J. P.; Klay, J. L.; Klein, J.; Klein, S.; Klein-Boesing, C.; Kleiner, M.; Klemenz, T.; Kluge, A.; Knospe, A. G.; Kobdaj, C.; Koehler, M. K.; Kollegger, T.; Kondratyev, A.; Kondratyeva, N.; Kondratyuk, E.; Konig, J.; Konigstorfer, S. A.; Konopka, P. J.; Kornakov, G.; Koryciak, S. D.; Koska, L.; Kotliarov, A.; Kovalenko, O.; Kovalenko, V; Kowalski, M.; Kralik, I; Kreis, L.; Krivda, M.; Krizek, F.; Gajdosova, K. Krizkova; Kroesen, M.; Kruger, M.; Kryshen, E.; Krzewicki, M.; Kuhn, C.; Kuijer, P. G.; Kumaoka, T.; Kumar, D.; Kumar, L.; Kumar, N.; Kundu, S.; Kurashvili, P.; Kurepin, A.; Kurepin, A. B.; Kuryakin, A.; Kushpil, S.; Kvapil, J.; Kweon, M. J.; Kwon, J. Y.; Kwon, Y.; La Pointe, S. L.; La Rocca, P.; Lai, Y. S.; Lakrathok, A.; Lamanna, M.; Langoy, R.; Lapidus, K.; Larionov, P.; Laudi, E.; Lautner, L.; Lavicka, R.; Lazareva, T.; Lea, R.; Lehrbach, J.; Lemmon, R. C.; Leon Monzon, I; Lesser, E. D.; Lettrich, M.; Levai, P.; Li, X.; Li, X. L.; Lien, J.; Lietava, R.; Lim, B.; Lim, S. H.; Lindenstruth, V; Lindner, A.; Lippmann, C.; Liu, A.; Liu, J.; Lofnes, I. M.; Loginov, V; Loizides, C.; Loncar, P.; Lopez, J. A.; Lopez, X.; Lopez Torres, E.; Luhder, J. R.; Lunardon, M.; Luparello, G.; Ma, Y. G.; Maevskaya, A.; Mager, M.; Mahmoud, T.; Maire, A.; Malaev, M.; Malik, N. M.; Malik, Q. W.; Malinina, L.; Mal'Kevich, D.; Mallick, N.; Malzacher, P.; Mandaglio, G.; Manko, V; Manso, F.; Manzari, V; Mao, Y.; Mares, J.; Margagliotti, G., V; Margotti, A.; Marin, A.; Markert, C.; Marquard, M.; Martin, N. A.; Martinengo, P.; Martinez, J. L.; Martinez, M., I; Garcia, G. Martinez; Masciocchi, S.; Masera, M.; Masoni, A.; Massacrier, L.; Mastroserio, A.; Mathis, A. M.; Matonoha, O.; Matuoka, P. F. T.; Matyja, A.; Mayer, C.; Mazuecos, A. L.; Mazzaschi, F.; Mazzilli, M.; Mazzoni, M. A.; Mdhluli, J. E.; Mechler, A. F.; Meddi, F.; Melikyan, Y.; Menchaca-Rocha, A.; Meninno, E.; Menon, A. S.; Meres, M.; Mhlanga, S.; Miake, Y.; Micheletti, L.; Migliorin, L. C.; Mihaylov, D. L.; Mikhaylov, K.; Mishra, A. N.; Modak, A.; Mohanty, A. P.; Mohanty, B.; Khan, M. Mohisin; Moravcova, Z.; Mordasini, C.; De Godoy, D. A. Moreira; Moreno, L. A. P.; Morozov, I; Morsch, A.; Mrnjavac, T.; Muccifora, V; Mudnic, E.; Muehlheim, D.; Muhuri, S.; Mulligan, J. D.; Mulliri, A.; Munhoz, M. G.; Munzer, R. H.; Murakami, H.; Murray, S.; Musa, L.; Musinsky, J.; Myrcha, J. W.; Naik, B.; Nair, R.; Nandi, B. K.; Nania, R.; Nappi, E.; Naru, M. U.; Nassirpour, A. F.; Nath, A.; Nattrass, C.; Neagu, A.; Nellen, L.; Nesbo, S., V; Neskovic, G.; Nesterov, D.; Nielsen, B. S.; Nikolaev, S.; Nikulin, S.; Nikulin, V; Noferini, F.; Noh, S.; Nomokonov, P.; Norman, J.; Novitzky, N.; Nowakowski, P.; Nyanin, A.; Nystrand, J.; Ogino, M.; Ohlson, A.; Okorokov, V. A.; Oleniacz, J.; Da Silva, A. C. Oliveira; Oliver, M. H.; Onnerstad, A.; Oppedisano, C.; Ortiz Velasquez, A.; Osako, T.; Oskarsson, A.; Otwinowski, J.; Oyama, K.; Pachmayer, Y.; Padhan, S.; Pagano, D.; Palasciano, A.; Pan, J.; Panebianco, S.; Pareek, P.; Park, J.; Parkkila, J. E.; Pathak, S. P.; Patra, R. N.; Paul, B.; Pazzini, J.; Pei, H.; Peitzmann, T.; Peng, X.; Pereira, L. G.; Da Costa, H. Pereira; Peresunko, D.; Perez, G. M.; Perrin, S.; Pestov, Y.; Petrovici, M.; Pezzi, R. P.; Piano, S.; Pikna, M.; Pillot, P.; Pinazza, O.; Pinsky, L.; Pinto, C.; Pisano, S.; Planinic, M.; Pliquett, F.; Poghosyan, M. G.; Polichtchouk, B.; Politano, S.; Poljak, N.; Pop, A.; Porteboeuf-Houssais, S.; Porter, J.; Pozdniakov, V; Prasad, S. K.; Preghenella, R.; Prino, F.; Pruneau, C. A.; Pshenichnov, I; Puccio, M.; Qiu, S.; Quaglia, L.; Quishpe, R. E.; Ragoni, S.; Rakotozafindrabe, A.; Ramello, L.; Rami, F.; Ramirez, S. A. R.; Ramos, A. G. T.; Rancien, T. A.; Raniwala, R.; Raniwala, S.; Rasanen, S. S.; Rath, R.; Ravasenga, I; Read, K. F.; Redelbach, A. R.; Redlich, K.; Rehman, A.; Reichelt, P.; Reidt, F.; Reme-ness, H. A.; Renfordt, R.; Rescakova, Z.; Reygers, K.; Riabov, A.; Riabov, V; Richert, T.; Richter, M.; Riegler, W.; Riggi, F.; Ristea, C.; Rode, S. P.; Cahuantzi, M. Rodriguez; Roed, K.; Rogalev, R.; Rogochaya, E.; Rogoschinski, T. S.; Rohr, D.; Rohrich, D.; Rojas, P. F.; Rokita, P. S.; Ronchetti, F.; Rosano, A.; Rosas, E. D.; Rossi, A.; Rotondi, A.; Roy, A.; Roy, P.; Roy, S.; Rubini, N.; Rueda, O., V; Rui, R.; Rumyantsev, B.; Russek, P. G.; Rustamov, A.; Ryabinkin, E.; Ryabov, Y.; Rybicki, A.; Rytkonen, H.; Rzesa, W.; Saarimaki, O. A. M.; Sadek, R.; Sadovsky, S.; Saetre, J.; Saha, S. K.; Saha, S.; Sahoo, B.; Sahoo, P.; Sahoo, R.; Sahoo, S.; Sahu, D.; Sahu, P. K.; Saini, J.; Sakai, S.; Sambyal, S.; Samsonov, V; Sarkar, D.; Sarkar, N.; Sarma, P.; Sarti, V. M.; Sas, M. H. P.; Schambach, J.; Scheid, H. S.; Schiaua, C.; Schicker, R.; Schmah, A.; Schmidt, C.; Schmidt, H. R.; Schmidt, M. O.; Schmidt, M.; Schmidt, N., V; Schmier, A. R.; Schotter, R.; Schukraft, J.; Schutz, Y.; Schwarz, K.; Schweda, K.; Scioli, G.; Scomparin, E.; Seger, J. E.; Sekiguchi, Y.; Sekihata, D.; Selyuzhenkov, I; Senyukov, S.; Seo, J. J.; Serebryakov, D.; Sevcenco, A.; Shaba, T. J.; Shabanov, A.; Shabetai, A.; Shahoyan, R.; Shaikh, W.; Shangaraev, A.; Sharma, A.; Sharma, H.; Sharma, M.; Sharma, N.; Sharma, S.; Sharma, U.; Sheibani, O.; Shigaki, K.; Shimomura, M.; Shirinkin, S.; Shou, Q.; Sibiriak, Y.; Siddhanta, S.; Siemiarczuk, T.; Silva, T. F.; Silvermyr, D.; Simonetti, G.; Singh, B.; Singh, R.; Singh, R.; Singh, R.; Singh, V. K.; Singhal, V; Sinha, T.; Sitar, B.; Sitta, M.; Skaali, T. B.; Skorodumovs, G.; Slupecki, M.; Smirnov, N.; Snellings, R. J. M.; Soncco, C.; Song, J.; Songmoolnak, A.; Soramel, F.; Sorensen, S.; Sputowska, I; Stachel, J.; Stan, I; Steffanic, P. J.; Stiefelmaier, S. F.; Stocco, D.; Storehaug, I; Storetvedt, M. M.; Stylianidis, C. P.; Suaide, A. A. P.; Sugitate, T.; Suire, C.; Suljic, M.; Sultanov, R.; Sumbera, M.; Sumberia, V; Sumowidagdo, S.; Swain, S.; Szabo, A.; Szarka, I; Tabassam, U.; Taghavi, S. F.; Taillepied, G.; Takahashi, J.; Tambave, G. J.; Tang, S.; Tang, Z.; Tarhini, M.; Tarzila, M. G.; Tauro, A.; Tejeda Munoz, G.; Telesca, A.; Terlizzi, L.; Terrevoli, C.; Tersimonov, G.; Thakur, S.; Thomas, D.; Tieulent, R.; Tikhonov, A.; Timmins, A. R.; Tkacik, M.; Toia, A.; Topilskaya, N.; Toppi, M.; Torales-Acosta, F.; Tork, T.; Cruz-Torres, R.; Torres, S. R.; Trifiro, A.; Tripathy, S.; Tripathy, T.; Trogolo, S.; Trombetta, G.; Trubnikov, V; Trzaska, W. H.; Trzcinski, T. P.; Trzeciak, B. A.; Tumkin, A.; Turrisi, R.; Tveter, T. S.; Ullaland, K.; Uras, A.; Urioni, M.; Usai, G. L.; Vala, M.; Valle, N.; Vallero, S.; van der Kolk, N.; van Doremalen, L. V. R.; van Leeuwen, M.; Vande Vyvre, P.; Varga, D.; Varga, Z.; Varga-Kofarago, M.; Vargas, A.; Vasileiou, M.; Vasiliev, A.; Doce, O. Vazquez; Vechernin, V.; Vercellin, E.; Vergara Limon, S.; Vermunt, L.; Vertesi, R.; Verweij, M.; Vickovic, L.; Vilakazi, Z.; Baillie, O. Villalobos; Vino, G.; Vinogradov, A.; Virgili, T.; Vislavicius, V.; Vodopyanov, A.; Volkel, B.; Voelkl, M. A.; Voloshin, K.; Voloshin, S. A.; Volpe, G.; von Haller, B.; Vorobyev, I; Voscek, D.; Vozniuk, N.; Vrlakova, J.; Wagner, B.; Wang, C.; Wang, D.; Weber, M.; Weelden, R. J. G., V; Wegrzynek, A.; Wenzel, S. C.; Wessels, J. P.; Wiechula, J.; Wikne, J.; Wilk, G.; Wilkinson, J.; Willems, G. A.; Windelband, B.; Winn, M.; Witt, W. E.; Wright, J. R.; Wu, W.; Wu, Y.; Xu, R.; Yalcin, S.; Yamaguchi, Y.; Yamakawa, K.; Yang, S.; Yano, S.; Yin, Z.; Yokoyama, H.; Yoo, I-K; Yoon, J. H.; Yuan, S.; Yuncu, A.; Zaccolo, V; Zaman, A.; Zampolli, C.; Zanoli, H. J. C.; Zardoshti, N.; Zarochentsev, A.; Zavada, P.; Zaviyalov, N.; Zbroszczyk, H.; Zhalov, M.; Zhang, S.; Zhang, X.; Zhang, Y.; Zherebchevskii, V; Zhi, Y.; Zhigareva, N.; Zhou, D.; Zhou, Y.; Zhu, J.; Zhu, Y.; Zichichi, A.; Zinovjev, G.; Zurlo, N.Acharya, S.; Adamova, D.; Adler, A.; Adolfsson, J.; Rinella, G. Aglieri; Agnello, M.; Agrawal, N.; Ahammed, Z.; Ahmad, S.; Ahn, S. U.; Ahuja, I; Akbar, Z.; Akindinov, A.; Al-Turany, M.; Alam, S. N.; Aleksandrov, D.; Alessandro, B.; Alfanda, H. M.; Alfaro Molina, R.; Ali, B.; Ali, Y.; Alici, A.; Alizadehvandchali, N.; Alkin, A.; Alme, J.; Alt, T.; Altenkamper, L.; Altsybeev, I; Anaam, M. N.; Andrei, C.; Andreou, D.; Andronic, A.; Angeletti, M.; Anguelov, V; Antinori, F.; Antonioli, P.; Anuj, C.; Apadula, N.; Aphecetche, L.; Appelshaeuser, H.; Arcelli, S.; Arnaldi, R.; Arsene, I. C.; Arslandok, M.; Augustinus, A.; Averbeck, R.; Aziz, S.; Azmi, M. D.; Badala, A.; Baek, Y. W.; Bai, X.; Bailhache, R.; Bailung, Y.; Bala, R.; Balbino, A.; Baldisseri, A.; Balis, B.; Ball, M.; Banerjee, D.; Barbera, R.; Barioglio, L.; Barlou, M.; Barnafoldi, G. G.; Barnby, L. S.; Barret, V; Bartels, C.; Barth, K.; Bartsch, E.; Baruffaldi, F.; Bastid, N.; Basu, S.; Batigne, G.; Batyunya, B.; Bauri, D.; Alba, J. L. Bazo; Bearden, I. G.; Beattie, C.; Belikov, I; Hechavarria, A. D. C. Bell; Bellini, F.; Bellwied, R.; Belokurova, S.; Belyaev, V; Bencedi, G.; Beole, S.; Bercuci, A.; Berdnikov, Y.; Berdnikova, A.; Bergmann, L.; Besoiu, M. G.; Betev, L.; Bhaduri, P. P.; Bhasin, A.; Bhat, M. A.; Bhattacharjee, B.; Bhattacharya, P.; Bianchi, L.; Bianchi, N.; Biernat, J.; Bilandzic, A.; Biro, G.; Biswas, S.; Blair, J. T.; Blau, D.; Blidaru, M. B.; Blume, C.; Boca, G.; Bock, F.; Bogdanov, A.; Boi, S.; Bok, J.; Boldizsar, L.; Bolozdynya, A.; Bombara, M.; Bond, P. M.; Bonomi, G.; Borel, H.; Borissov, A.; Bossi, H.; Botta, E.; Bratrud, L.; Braun-Munzinger, P.; Bregant, M.; Broz, M.; Bruno, G. E.; Buckland, M. D.; Budnikov, D.; Buesching, H.; Bufalino, S.; Bugnon, O.; Buhler, P.; Buthelezi, Z.; Butt, J. B.; Bysiak, S. A.; Caffarri, D.; Cai, M.; Caines, H.; Caliva, A.; Calvo Villar, E.; Camacho, J. M. M.; Camacho, R. S.; Camerini, P.; Canedo, F. D. M.; Carnesecchi, F.; Caron, R.; Castellanos, J. Castillo; Casula, E. A. R.; Catalano, F.; Sanchez, C. Ceballos; Chakraborty, P.; Chandra, S.; Chapeland, S.; Chartier, M.; Chattopadhyay, S.; Chattopadhyay, S.; Chauvin, A.; Chavez, T. G.; Cheshkov, C.; Cheynis, B.; Barroso, V. Chibante; Chinellato, D. D.; Cho, S.; Chochula, P.; Christakoglou, P.; Christensen, C. H.; Christiansen, P.; Chujo, T.; Cicalo, C.; Cifarelli, L.; Cindolo, F.; Ciupek, M. R.; Clai, G.; Cleymans, J.; Colamaria, F.; Colburn, J. S.; Colella, D.; Collu, A.; Colocci, M.; Concas, M.; Balbastre, G. Conesa; del Valle, Z. Conesa; Contin, G.; Contreras, J. G.; Coquet, M. L.; Cormier, T. M.; Cortese, P.; Cosentino, M. R.; Costa, F.; Costanza, S.; Crochet, P.; Cuautle, E.; Cui, P.; Cunqueiro, L.; Dainese, A.; Damas, F. P. A.; Danisch, M. C.; Danu, A.; Das, I; Das, P.; Das, P.; Das, S.; Dash, S.; De, S.; De Caro, A.; de Cataldo, G.; De Cilladi, L.; de Cuveland, J.; De Falco, A.; De Gruttola, D.; De Marco, N.; De Martin, C.; De Pasquale, S.; Deb, S.; Degenhardt, H. F.; Deja, K. R.; Dello Stritto, L.; Delsanto, S.; Deng, W.; Dhankher, P.; Di Bari, D.; Di Mauro, A.; Diaz, R. A.; Dietel, T.; Ding, Y.; Divia, R.; Djuvsland, O.; Dixit, D. U.; Dmitrieva, U.; Do, J.; Dobrin, A.; Doenigus, B.; Dordic, O.; Dubey, A. K.; Dubla, A.; Dudi, S.; Dukhishyam, M.; Dupieux, P.; Dzalaiova, N.; Eder, T. M.; Ehlers, R. J.; Eikeland, V. N.; Eisenhut, F.; Elia, D.; Erazmus, B.; Ercolessi, F.; Erhardt, F.; Erokhin, A.; Ersdal, M. R.; Espagnon, B.; Eulisse, G.; Evans, D.; Evdokimov, S.; Fabbietti, L.; Faggin, M.; Faivre, J.; Fan, F.; Fantoni, A.; Fasel, M.; Fecchio, P.; Feliciello, A.; Feofilov, G.; Fernandez Tellez, A.; Ferrero, A.; Ferretti, A.; Feuillard, V. J. G.; Figiel, J.; Filchagin, S.; Finogeev, D.; Fionda, F. M.; Fiorenza, G.; Flor, F.; Flores, A. N.; Foertsch, S.; Foka, P.; Fokin, S.; Fragiacomo, E.; Frajna, E.; Fuchs, U.; Funicello, N.; Furget, C.; Furs, A.; Gaardhoje, J. J.; Gagliardi, M.; Gago, A. M.; Gal, A.; Galvan, C. D.; Ganoti, P.; Garabatos, C.; Garcia, J. R. A.; Garcia-Solis, E.; Garg, K.; Gargiulo, C.; Garibli, A.; Garner, K.; Gasik, P.; Gauger, E. F.; Gautam, A.; Ducati, M. B. Gay; Germain, M.; Ghosh, P.; Ghosh, S. K.; Giacalone, M.; Gianotti, P.; Giubellino, P.; Giubilato, P.; Glaenzer, A. M. C.; Glassel, P.; Goh, D. J. Q.; Gonzalez, V; Gonzalez-Trueba, L. H.; Gorbunov, S.; Gorgon, M.; Gorlich, L.; Gotovac, S.; Grabski, V; Graczykowski, L. K.; Greiner, L.; Grelli, A.; Grigoras, C.; Grigoriev, V; Grigoryan, A.; Grigoryan, S.; Groettvik, O. S.; Grosa, F.; Grosse-Oetringhaus, J. F.; Grosso, R.; Guardiano, G. G.; Guernane, R.; Guilbaud, M.; Gulbrandsen, K.; Gunji, T.; Gupta, A.; Gupta, R.; Guzman, S. P.; Gyulai, L.; Habib, M. K.; Hadjidakis, C.; Halimoglu, G.; Hamagaki, H.; Hamar, G.; Hamid, M.; Hannigan, R.; Haque, M. R.; Harlenderova, A.; Harris, J. W.; Harton, A.; Hasenbichler, J. A.; Hassan, H.; Hatzifotiadou, D.; Hauer, P.; Havener, L. B.; Hayashi, S.; Heckel, S. T.; Hellbar, E.; Helstrup, H.; Herman, T.; Hernandez, E. G.; Herrera Corral, G.; Herrmann, F.; Hetland, K. F.; Hillemanns, H.; Hills, C.; Hippolyte, B.; Hofman, B.; Hohlweger, B.; Honermann, J.; Hong, G. H.; Horak, D.; Hornung, S.; Horzyk, A.; Hosokawa, R.; Hristov, P.; Hughes, C.; Huhn, P.; Humanic, T. J.; Hushnud, H.; Husova, L. A.; Hutson, A.; Hutter, D.; Iddon, J. P.; Ilkaev, R.; Ilyas, H.; Inaba, M.; Innocenti, G. M.; Ippolitov, M.; Isakov, A.; Islam, M. S.; Ivanov, M.; Ivanov, V; Izucheev, V; Jablonski, M.; Jacak, B.; Jacazio, N.; Jacobs, P. M.; Jadlovska, S.; Jadlovsky, J.; Jaelani, S.; Jahnke, C.; Jakubowska, M. J.; Jalotra, A.; Janik, M. A.; Janson, T.; Jercic, M.; Jevons, O.; Jonas, F.; Jones, P. G.; Jowett, J. M.; Jung, J.; Jung, M.; Junique, A.; Jusko, A.; Kaewjai, J.; Kalinak, P.; Kalweit, A.; Kaplin, V; Kar, S.; Uysal, A. Karasu; Karatovic, D.; Karavichev, O.; Karavicheva, T.; Karczmarczyk, P.; Karpechev, E.; Kazantsev, A.; Kebschull, U.; Keidel, R.; Keijdener, D. L. D.; Keil, M.; Ketzer, B.; Khabanova, Z.; Khan, A. M.; Khan, S.; Khanzadeev, A.; Kharlov, Y.; Khatun, A.; Khuntia, A.; Kileng, B.; Kim, B.; Kim, C.; Kim, D.; Kim, D. J.; Kim, E. J.; Kim, J.; Kim, J. S.; Kim, J.; Kim, J.; Kim, J.; Kim, M.; Kim, S.; Kim, T.; Kirsch, S.; Kisel, I; Kiselev, S.; Kisiel, A.; Kitowski, J. P.; Klay, J. L.; Klein, J.; Klein, S.; Klein-Boesing, C.; Kleiner, M.; Klemenz, T.; Kluge, A.; Knospe, A. G.; Kobdaj, C.; Koehler, M. K.; Kollegger, T.; Kondratyev, A.; Kondratyeva, N.; Kondratyuk, E.; Konig, J.; Konigstorfer, S. A.; Konopka, P. J.; Kornakov, G.; Koryciak, S. D.; Koska, L.; Kotliarov, A.; Kovalenko, O.; Kovalenko, V; Kowalski, M.; Kralik, I; Kreis, L.; Krivda, M.; Krizek, F.; Gajdosova, K. Krizkova; Kroesen, M.; Kruger, M.; Kryshen, E.; Krzewicki, M.; Kuhn, C.; Kuijer, P. G.; Kumaoka, T.; Kumar, D.; Kumar, L.; Kumar, N.; Kundu, S.; Kurashvili, P.; Kurepin, A.; Kurepin, A.

Λ+c production in pp and in p-Pb collisions at √sNN=5.02 TeV

The production cross section of prompt Λ+c charm baryons was measured with the ALICE detector at the LHC at midrapidity in proton-proton (pp) and proton-lead (p–Pb) collisions at a center-of-mass energy per nucleon pair of √sNN=5.02 TeV. The Λ+c and Λ¯−c baryons were reconstructed in the hadronic decay channels Λ+c→pK−π+ and Λ+c→pK0S and respective charge conjugates. The measured differential cross sections as a function of transverse momentum (pT) and the pT-integrated Λ+c production cross section in pp and in p–Pb collisions are presented. The Λ+c nuclear modification factor (RpPb), calculated from the cross sections in pp and in p–Pb collisions, is presented and compared with the RpPb of D mesons. The Λ+c/D0 ratio is also presented and compared with the light-flavor baryon-to-meson ratios p/π and Λ/K0S, and measurements from other LHC experiments. The results are compared to predictions from model calculations and Monte Carlo event generators

Λc+ Production and Baryon-to-Meson Ratios in pp and p -Pb Collisions at sNN =5.02 TeV at the LHC

The prompt production of the charm baryon Λþ c and the Λþ c =D0 production ratios were measured at midrapidity with the ALICE detector in pp and p-Pb collisions at ffiffiffiffiffiffiffi sNN p ¼ 5.02 TeV. These new measurements show a clear decrease of the Λþ c =D0 ratio with increasing transverse momentum (pT ) in both collision systems in the range 2 < pT < 12 GeV=c, exhibiting similarities with the light-flavor baryon-tomeson ratios p=π and Λ=K0 S. At low pT, predictions that include additional color-reconnection mechanisms beyond the leading-color approximation, assume the existence of additional higher-mass charm-baryon states, or include hadronization via coalescence can describe the data, while predictions driven by charmquark fragmentation processes measured in eþe− and e−p collisions significantly underestimate the data. The results presented in this Letter provide significant evidence that the established assumption of universality (colliding-system independence) of parton-to-hadron fragmentation is not sufficient to describe charm-baryon production in hadronic collisions at LHC energies

Long- and short-range correlations and their event-scale dependence in high-multiplicity pp collisions at √s = 13 TeV

Two-particle angular correlations are measured in high-multiplicity protonproton collisions at √ s = 13 TeV by the ALICE Collaboration. The yields of particle pairs at short-(∆η ∼ 0) and long-range (1.6 < |∆η| < 1.8) in pseudorapidity are extracted on the near-side (∆ϕ ∼ 0). They are reported as a function of transverse momentum (pT) in the range 1 < pT < 4 GeV/c. Furthermore, the event-scale dependence is studied for the first time by requiring the presence of high-pT leading particles or jets for varying pT thresholds. The results demonstrate that the long-range “ridge” yield, possibly related to the collective behavior of the system, is present in events with high-pT processes as well. The magnitudes of the short- and long-range yields are found to grow with the event scale. The results are compared to EPOS LHC and PYTHIA 8 calculations, with and without string-shoving interactions. It is found that while both models describe the qualitative trends in the data, calculations from EPOS LHC show a better quantitative agreement for the pT dependency, while overestimating the event-scale dependency

General balance functions of identified charged hadron pairs of (π,K,p) in Pb–Pb collisions at 2.76 TeV

First measurements of balance functions (BFs) of all combinations of identified charged hadron (π,K,p) pairs in Pb–Pb collisions at sNN=2.76 TeV recorded by the ALICE detector are presented. The BF measurements are carried out as two-dimensional differential correlators versus the relative rapidity (Δy) and azimuthal angle (Δφ) of hadron pairs, and studied as a function of collision centrality. The Δφ dependence of BFs is expected to be sensitive to the light quark diffusivity in the quark–gluon plasma. While the BF azimuthal widths of all pairs substantially decrease from peripheral to central collisions, the longitudinal widths exhibit mixed behaviors: BFs of ππ and cross-species pairs narrow significantly in more central collisions, whereas those of KK and pp are found to be independent of collision centrality. This dichotomy is qualitatively consistent with the presence of strong radial flow effects and the existence of two stages of quark production in relativistic heavy-ion collisions. Finally, the first measurements of the collision centrality evolution of BF integrals are presented, with the observation that charge balancing fractions are nearly independent of collision centrality in Pb–Pb collisions. Overall, the results presented provide new and challenging constraints for theoretical models of hadron production and transport in relativistic heavy-ion collisions