Measurements of production and inelastic cross sections for p+C, p+Be, and p+Al at 60 GeV/c and p+C and p+Be at 120 GeV/c

This paper presents measurements of production cross sections and inelastic cross sections for the following reactions: 60 GeV=c protons with C, Be, Al targets and 120 GeV=c protons with C and Be targets. The analysis is performed using the NA61/SHINE spectrometer at the CERN Super Proton Synchrotron. First measurements are obtained using protons at 120 GeV=c, while the results for protons at 60 GeV=c are compared with previously published measurements. These interaction cross section measurements are critical inputs for neutrino flux prediction in current and future accelerator-based long-baseline neutrino experiments.Authors:A. Aduszkiewicz,15 E. V. Andronov,21 T. Antićić,3 V. Babkin,19 M. Baszczyk,13 S. Bhosale,10 A. Blondel,23 M. Bogomilov,2 A. Brandin,20 A. Bravar,23 W. Bryliński,17 J. Brzychczyk,12 M. Buryakov,19 O. Busygina,18 A. Bzdak,13 H. Cherif,6 M. Ćirković,22 M. Csanad,7 J. Cybowska,17 T. Czopowicz,17 A. Damyanova,23 N. Davis,10 M. Deliyergiyev,9 M. Deveaux,6 A. Dmitriev,19 W. Dominik,15 P. Dorosz,13 J. Dumarchez,4 R. Engel,5 G. A. Feofilov,21 L. Fields,24 Z. Fodor,7,16 A. Garibov,1 M. Gaździcki,6,9 O. Golosov,20 M. Golubeva,18 K. Grebieszkow,17 F. Guber,18 A. Haesler,23 S. N. Igolkin,21 S. Ilieva,2 A. Ivashkin,18 S. R. Johnson,26 K. Kadija,3 E. Kaptur,14 N. Kargin,20 E. Kashirin,20 M. Kiełbowicz,10 V. A. Kireyeu,19 V. Klochkov,6 V. I. Kolesnikov,19 D. Kolev,2 A. Korzenev,23 V. N. Kovalenko,21 K. Kowalik,11 S. Kowalski,14 M. Koziel,6 A. Krasnoperov,19 W. Kucewicz,13 M. Kuich,15 A. Kurepin,18 D. Larsen,12 A. László,7 T. V. Lazareva,21 M. Lewicki,16 K. Łojek,12 B. Łysakowski,14 V. V. Lyubushkin,19 M. Maćkowiak-Pawłowska,17 Z. Majka,12 B. Maksiak,11 A. I. Malakhov,19 A. Marchionni,24 A. Marcinek,10 A. D. Marino,26 K. Marton,7 H.-J. Mathes,5 T. Matulewicz,15 V. Matveev,19 G. L. Melkumov,19 A. O. Merzlaya,12 B. Messerly,27 Ł. Mik,13 G. B. Mills,25 S. Morozov,18,20 S. Mrówczyński,9 Y. Nagai ,26 M. Naskręt,16 V. Ozvenchuk,10 V. Paolone,27 M. Pavin,4,3 O. Petukhov,18 R. Płaneta,12 P. Podlaski,15 B. A. Popov,19,4 B. Porfy,7 M. Posiadała-Zezula,15 D. S. Prokhorova,21 D. Pszczel,11 S. Puławski,14 J. Puzović,22 M. Ravonel,23 R. Renfordt,6 E. Richter-Wąs,12 D. Röhrich,8 E. Rondio,11 M. Roth,5 B. T. Rumberger,26 M. Rumyantsev,19 A. Rustamov,1,6 M. Rybczynski,9 A. Rybicki,10 A. Sadovsky,18 K. Schmidt,14 I. Selyuzhenkov,20 A. Yu. Seryakov,21 P. Seyboth,9 M. Słodkowski,17 A. Snoch,6 P. Staszel,12 G. Stefanek,9 J. Stepaniak,11 M. Strikhanov,20 H. Ströbele,6 T. Šuša,3 A. Taranenko,20 A. Tefelska,17 D. Tefelski,17 V. Tereshchenko,19 A. Toia,6 R. Tsenov,2 L. Turko,16 R. Ulrich,5 M. Unger,5 F. F. Valiev,21 D. Veberič,5 V. V. Vechernin,21 A. Wickremasinghe,27 Z.Włodarczyk,9 A.Wojtaszek-Szwarc,9 K. Wójcik,14 O.Wyszyński,12 L. Zambelli,4 E. D. Zimmerman,26 and R. Zwaska24 (NA61/SHINE Collaboration) 1National Nuclear Research Center, Baku, Azerbaijan 2Faculty of Physics, University of Sofia, Sofia, Bulgaria 3Rud¯er Bošković Institute, Zagreb, Croatia 4LPNHE, University of Paris VI and VII, Paris, France 5Karlsruhe Institute of Technology, Karlsruhe, Germany 6University of Frankfurt, Frankfurt, Germany 7Wigner Research Centre for Physics of the Hungarian Academy of Sciences, Budapest, Hungary 8University of Bergen, Bergen, Norway 9Jan Kochanowski University in Kielce, Poland 10Institute of Nuclear Physics, Polish Academy of Sciences, Cracow, Poland 11National Centre for Nuclear Research, Warsaw, Poland 12Jagiellonian University, Cracow, Poland 13AGH—University of Science and Technology, Cracow, Poland 14University of Silesia, Katowice, Poland 15University of Warsaw, Warsaw, Poland 16University of Wrocław, Wrocław, Poland 17Warsaw University of Technology, Warsaw, Poland 18Institute for Nuclear Research, Moscow, Russia 19Joint Institute for Nuclear Research, Dubna, Russia 20National Research Nuclear University (Moscow Engineering Physics Institute), Moscow, Russia 21St. Petersburg State University, St. Petersburg, Russia 22University of Belgrade, Belgrade, Serbia 23University of Geneva, Geneva, Switzerland 24Fermilab, Batavia, Illinois, USA 25Los Alamos National Laboratory, Los Alamos, New Mexico, USA 26University of Colorado, Boulder, Colorado, USA 27University of Pittsburgh, Pittsburgh, Pennsylvania, US

Hidden strangeness shines in NA61/SHINE

Preliminary results on the ϕ (1020) meson production in inelastic proton-proton collisions measured by the NA61/SHINE experiment at the CERN SPS are presented in these proceedings. The results include the first ever differential pT and y measurements at beam momenta of 40 and 80 GeV and the most ever detailed experimental data at 158GeV. The comparison of p + p to Pb + Pb results shows a non-trivial system size dependence of the widths of the rapidity distributions for ϕ mesons, contrasting with that of other hadrons. The results are furthermore compared to the world data on ϕ meson production, demonstrating the better accuracy achieved by the NA61/SHINE experiment, and to several models. None of the models is found to be able to describe simultaneously the shape of transverse momentum spectra, the shape of rapidity distribution and the total yield

NA61/SHINE measurements of anisotropic flow relative to the spectator plane in Pb+Pb collisions at 30A GeV/c

We present an analysis of the anisotropic flow harmonics in Pb+Pb collisions at beam momenta of 30A GeV/c collected by the NA61/SHINE experiment in the year 2016. Directed and elliptic flow coefficients are measured relative to the spectator plane estimated with the Projectile Spectators Detector (PSD). The flow coefficients are reported as a function of transverse momentum in different classes of collision centrality. The results are compared with a new analysis of the NA49 data for Pb+Pb collisions at 40A GeV using forward calorimeters (VCal and RCal) for event plane estimation

Search for the critical point by the NA61/SHINE experiment

NA61/SHINE is a fixed target experiment operating at CERN SPS. Its main goals are to search for the critical point of stronglyinteractingmatterandtostudytheonsetofdeconfinement. Forthesegoalsascanofthetwodimensionalphase diagram (T-μB) is being performed at the SPS by measurements of hadron production in proton-proton, proton-nucleus and nucleus-nucleus interactions as a function of collision energy. In this paper the status of the search for the critical point of strongly interacting matter by the NA61/SHINE Collaboration is presented including recent results on proton intermittency, strongly intensive fluctuation observables of multiplicity and transverse momentum fluctuations. These measurements are expected to be sensitive to the correlation length and, therefore, have the ability to reveal the existence of the critical point via possible non-monotonic behavior. The new NA61/SHINE results are compared to the model predictions

K∗(892) meson production in inelastic p+p interactions at 158 GeV/c beam momentum measured by NA61/SHINE at the CERN SPS

NA61/SHINE Collaboration A. Aduszkiewicz15, E. V. Andronov21, T. Anti´ci´c3, V. Babkin19, M. Baszczyk13, S. Bhosale10, A. Blondel23, M. Bogomilov2, A. Brandin20, A. Bravar23,W. Bryli ´ nski17, J. Brzychczyk12, M. Buryakov19, O. Busygina18, A. Bzdak13, H. Cherif6, M. C´ irkovic´22, M. Csanad7, J. Cybowska17, T. Czopowicz9,17, A. Damyanova23, N. Davis10, M. Deliyergiyev9, M. Deveaux6, A. Dmitriev19, W. Dominik15, P. Dorosz13, J. Dumarchez4, R. Engel5, G. A. Feofilov21, L. Fields24, Z. Fodor7,16, A. Garibov1, M. Ga´zdzicki6,9, O. Golosov20, V. Golovatyuk19, M. Golubeva18, K. Grebieszkow17,a, F. Guber18, A. Haesler23, S. N. Igolkin21, S. Ilieva2, A. Ivashkin18, S. R. Johnson25, K. Kadija3, E. Kaptur14, N. Kargin20, E. Kashirin20, M. Kiełbowicz10,V. A. Kireyeu19, V. Klochkov6, V. I. Kolesnikov19, D. Kolev2, A. Korzenev23,V. N. Kovalenko21, S. Kowalski14, M. Koziel6, A. Krasnoperov19,W. Kucewicz13, M. Kuich15, A. Kurepin18, D. Larsen12, A. László7, T. V. Lazareva21, M. Lewicki16, K. Łojek12, B. Łysakowski14, V. V. Lyubushkin19, M.Ma´ckowiak-Pawłowska17, Z. Majka12, B. Maksiak11, A. I. Malakhov19, D. Mani´c22, A. Marcinek10, A. D. Marino25, K. Marton7, H.-J. Mathes5, T. Matulewicz15, V.Matveev19, G. L. Melkumov19, A. O. Merzlaya12, B. Messerly26, Ł.Mik13, S. Morozov18,20, S. Mrówczy´ nski9, Y. Nagai25, M. Naskre˛t16, V. Ozvenchuk10, V. Paolone26, O. Petukhov18, R. Płaneta12, P. Podlaski15, B. A. Popov4,19, B. Porfy7, M. Posiadała-Zezula15, D. S. Prokhorova21, D. Pszczel11, S. Puławski14, J. Puzovi´c22, M. Ravonel23, R. Renfordt6, E. Richter-Wa˛s12, D. Röhrich8, E. Rondio11, M. Roth5, B. T. Rumberger25, M. Rumyantsev19, A. Rustamov1,6, M. Rybczynski9, A. Rybicki10, A. Sadovsky18, K. Schmidt14, I. Selyuzhenkov20, A. Yu. Seryakov21, P. Seyboth9, M. Słodkowski17, P. Staszel12, G. Stefanek9, J. Stepaniak11, M. Strikhanov20, H. Ströbele6, T. Šuša3, A. Taranenko20, A. Tefelska17, D. Tefelski17, V. Tereshchenko19, A. Toia6, R. Tsenov2, L. Turko16, R. Ulrich5, M. Unger5, F. F. Valiev21, D. Veberiˇc5, V. V. Vechernin21, A. Wickremasinghe24,26, Z. Włodarczyk9, O. Wyszy´nski12, E. D. Zimmerman25, R. Zwaska24The measurement of K∗ (892)0 resonance production via its K+ π − decay mode in inelastic p+p collisions at beam momentum 158 GeV/c ( √ sNN = 17.3 GeV) is presented. The data were recorded by the NA61/SHINE hadron spectrometer at the CERN Super Proton Synchrotron. The template methodwas used to extract the K∗ (892)0 signal and double-differential transverse momentum and rapidity spectra were obtained. The full phase-space mean multiplicity of K∗ (892)0 mesons was found to be (78.44 ± 0.38(stat) ± 6.0(sys)) · 10−3. The NA61/SHINE results are compared with the Epos1.99 and Hadron Resonance Gas models as well as with world data from p+p and nucleus–nucleus collisions