68 research outputs found
Cross Sections for the Reactions e+e- --> K+ K- pi+pi-, K+ K- pi0pi0, and K+ K- K+ K- Measured Using Initial-State Radiation Events
We study the processes e+e- --> K+ K- pi+pi-gamma, K+ K- pi0pi0gamma, and K+
K- K+ K-gamma, where the photon is radiated from the initial state. About
84000, 8000, and 4200 fully reconstructed events, respectively, are selected
from 454 fb-1 of BaBar data. The invariant mass of the hadronic final state
defines the \epem center-of-mass energy, so that the K+ K- pi+pi- data can be
compared with direct measurements of the e+e- --> K+ K- pi+pi- reaction. No
direct measurements exist for the e+e- --> K+ K-pi0pi0 or e+e- --> K+ K-K+ K-
reactions, and we present an update of our previous result with doubled
statistics. Studying the structure of these events, we find contributions from
a number of intermediate states, and extract their cross sections. In
particular, we perform a more detailed study of the e+e- --> phi(1020)pipigamma
reaction, and confirm the presence of the Y(2175) resonance in the phi(1020)
f0(980) and K+K-f0(980) modes. In the charmonium region, we observe the J/psi
in all three final states and in several intermediate states, as well as the
psi(2S) in some modes, and measure the corresponding product of branching
fraction and electron width.Comment: 35 pages, 42 figure
Study of Upsilon(3S,2S) -> eta Upsilon(1S) and Upsilon(3S,2S) -> pi+pi- Upsilon(1S) hadronic trasitions
We study the Upsilon(3S,2S)->eta Upsilon(1S) and Upsilon(3S,2S)->pi+pi-
Upsilon(1S) transitions with 122 million Upsilon(3S) and 100 million
Upsilon(2S) mesons collected by the BaBar detector at the PEP-II asymmetric
energy e+e- collider. We measure B[Upsilon(2S)->eta
Upsilon(1S)]=(2.39+/-0.31(stat.)+/-0.14(syst.))10^-4 and Gamma[Upsilon(2S)->eta
Upsilon(1S)]/Gamma[Upsilon(2S)-> pi+pi-
Upsilon(1S)]=(1.35+/-0.17(stat.)+/-0.08(syst.))10^-3. We find no evidence for
Upsilon(3S)->eta Upsilon(1S) and obtain B[Upsilon(3S)->eta Upsilon(1S)]<1.0
10^-4 and Gamma[Upsilon(3S)->eta Upsilon(1S)]/Gamma[Upsilon(3S)->pi+pi-
Upsilon(1S)]<2.3 10^-3 as upper limits at the 90% confidence level. We also
provide improved measurements of the Upsilon(2S) - Upsilon(1S) and Upsilon(3S)
- Upsilon(1S) mass differences, 562.170+/-0.007(stat.)+/-0.088(syst.) MeV/c^2
and 893.813+/-0.015(stat.)+/-0.107(syst.) MeV/c^2 respectively.Comment: 8 pages, 16 encapsulated postscript figures, submitted to Phys.Rev.
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A Search for Dark Higgs Bosons
Recent astrophysical and terrestrial experiments have motivated the proposal
of a dark sector with GeV-scale gauge boson force carriers and new Higgs
bosons. We present a search for a dark Higgs boson using 516 fb-1 of data
collected with the BABAR detector. We do not observe a significant signal and
we set 90% confidence level upper limits on the product of the Standard
Model-dark sector mixing angle and the dark sector coupling constant.Comment: 7 pages, 5 postscript figures, published version with improved plots
for b/w printin
Evidence for the h_b(1P) meson in the decay Upsilon(3S) --> pi0 h_b(1P)
Using a sample of 122 million Upsilon(3S) events recorded with the BaBar
detector at the PEP-II asymmetric-energy e+e- collider at SLAC, we search for
the spin-singlet partner of the P-wave chi_{bJ}(1P) states in the
sequential decay Upsilon(3S) --> pi0 h_b(1P), h_b(1P) --> gamma eta_b(1S). We
observe an excess of events above background in the distribution of the recoil
mass against the pi0 at mass 9902 +/- 4(stat.) +/- 2(syst.) MeV/c^2. The width
of the observed signal is consistent with experimental resolution, and its
significance is 3.1sigma, including systematic uncertainties. We obtain the
value (4.3 +/- 1.1(stat.) +/- 0.9(syst.)) x 10^{-4} for the product branching
fraction BF(Upsilon(3S)-->pi0 h_b) x BF(h_b-->gamma eta_b).Comment: 8 pages, 4 postscript figures, submitted to Phys. Rev. D (Rapid
Communications
Identification of a 4-microRNA Signature for Clear Cell Renal Cell Carcinoma Metastasis and Prognosis
Renal cell carcinoma (RCC) metastasis portends a poor prognosis and cannot be reliably predicted. Early determination of the metastatic potential of RCC may help guide proper treatment. We analyzed microRNA (miRNA) expression in clear cell RCC (ccRCC) for the purpose of developing a miRNA expression signature to determine the risk of metastasis and prognosis. We used the microarray technology to profile miRNA expression of 78 benign kidney and ccRCC samples. Using 28 localized and metastatic ccRCC specimens as the training cohort and the univariate logistic regression and risk score methods, we developed a miRNA signature model in which the expression levels of miR-10b, miR-139-5p, miR-130b and miR-199b-5p were used to determine the status of ccRCC metastasis. We validated the signature in an independent 40-sample testing cohort of different stages of primary ccRCCs using the microarray data. Within the testing cohort patients who had at least 5 years follow-up if no metastasis developed, the signature showed a high sensitivity and specificity. The risk status was proven to be associated with the cancer-specific survival. Using the most stably expressed miRNA among benign and tumorous kidney tissue as the internal reference for normalization, we successfully converted his signature to be a quantitative PCR (qPCR)-based assay, which showed the same high sensitivity and specificity. The 4-miRNA is associated with ccRCC metastasis and prognosis. The signature is ready for and will benefit from further large clinical cohort validation and has the potential for clinical application
Player migration and opportunity: examining the efficacy of the UEFA home-grown rule in six European football leagues.
The introduction of UEFAs home-grown rule occurred for the start of the 2006–2007 season with the full quota in place
from the 2008–2009 season, which imposed quotas on European clubs. From 2008, clubs are required to have at least 8
players classified as home-grown in the 25-player squad, up from 4 in 2006–2007 and 6 in 2007–2008. This study
examines the efficacy of this rule across the six major European leagues (England, France, Germany, Holland, Italy
and Spain) in relation to playing opportunities (minutes played and appearances) between 1999 and 2015. This was
also examined in relation to age. Since the home-grown rule was introduced for the six nations hosting the major
leagues, the rule had different impacts by nationality. Only Germany saw significant increases in the proportion of
minutes played by their players when comparing the periods before and after the home-grown rules were imposed.
Holland, albeit seeing a slight decrease overall, saw significant increases for playing time for under 21s and 22- to 25-year olds. England and Italy were the two nations where statistically significant decreases in indigenous playing opportunities were recorded since the home-grown rules were introduced
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Search for Production of Invisible Final States in Single-Photon Decays of
We search for single-photon decays of the resonance, invisible, where the invisible state is either a particle of definite mass, such as a light Higgs boson , or a pair of dark matter particles, . Both and χ are assumed to have zero spin. We tag decays with a dipion transition and look for events with a single energetic photon and significant missing energy. We find no evidence for such processes in the mass range and in the sample of decays collected with the BABAR detector and set stringent limits on new physics models that contain light dark matter states.Physic
Study of radiative bottomonium transitions using converted photons (vol 84, 072002, 2011)
none391noneLees JP; Poireau V; Prencipe E; Tisserand V; Tico JG; Grauges E; Martinelli M; Milanes DA; Palano A; Pappagallo M; Eigen G; Stugu B; Sun L; Brown DN; Kerth LT; Kolomensky YG; Lynch G; Koch H; Schroeder T; Asgeirsson DJ; Hearty C; Mattison TS; McKenna JA; Khan A; Blinov VE; Buzykaev AR; Druzhinin VP; Golubev VB; Kravchenko EA; Onuchin AP; Serednyakov SI; Skovpen YI; Solodov EP; Todyshev KY; Yushkov AN; Bondioli M; Curry S; Kirkby D; Lankford AJ; Mandelkern M; Stoker DP; Atmacan H; Gary JW; Liu F; Long O; Vitug GM; Campagnari C; Hong TM; Kovalskyi D; Richman JD; West CA; Eisner AM; Kroseberg J; Lockman WS; Martinez AJ; Schalk T; Schumm BA; Seiden A; Cheng CH; Doll DA; Echenard B; Flood KT; Hitlin DG; Ongmongkolkul P; Porter FC; Rakitin AY; Andreassen R; Dubrovin MS; Meadows BT; Sokoloff MD; Bloom PC; Ford WT; Gaz A; Nagel M; Nauenberg U; Smith JG; Wagner SR; Ayad R; Toki WH; Spaan B; Kobel MJ; Schubert KR; Schwierz R; Bernard D; Verderi M; Clark PJ; Playfer S; Watson JE; Bettoni D; Bozzi C; Calabrese R; Cibinetto G; Fioravanti E; Garzia I; Luppi E; Munerato M; Negrini M; Piemontese L; Baldini-Ferroli R; Calcaterra A; de Sangro R; Finocchiaro G; Nicolaci M; Pacetti S; Patteri P; Peruzzi IM; Piccolo M; Rama M; Zallo A; Contri R; Guido E; Lo Vetere M; Monge MR; Passaggio S; Patrignani C; Robutti E; Bhuyan B; Prasad V; Lee CL; Morii M; Edwards AJ; Adametz A; Marks J; Uwer U; Bernlochner FU; Ebert M; Lacker HM; Lueck T; Dauncey PD; Tibbetts M; Behera PK; Mallik U; Chen C; Cochran J; Crawley HB; Meyer WT; Prell S; Rosenberg EI; Rubin AE; Gritsan AV; Guo ZJ; Arnaud N; Davier M; Derkach D; Grosdidier G; Le Diberder F; Lutz AM; Malaescu B; Roudeau P; Schune MH; Stocchi A; Wormser G; Lange DJ; Wright DM; Bingham I; Chavez CA; Coleman JP; Fry JR; Gabathuler E; Hutchcroft DE; Payne DJ; Touramanis C; Bevan AJ; Di Lodovico F; Sacco R; Sigamani M; Cowan G; Paramesvaran S; Brown DN; Davis CL; Denig AG; Fritsch M; Gradl W; Hafner A; Alwyn KE; Bailey D; Barlow RJ; Jackson G; Lafferty GD; Cenci R; Hamilton B; Jawahery A; Roberts DA; Simi G; Dallapiccola C; Salvati E; Cowan R; Dujmic D; Sciolla G; Lindemann D; Patel PM; Robertson SH; Schram M; Biassoni P; Lazzaro A; Lombardo V; Palombo F; Stracka S; Cremaldi L; Godang R; Kroeger R; Sonnek P; Summers DJ; Nguyen X; Taras P; De Nardo G; Monorchio D; Onorato G; Sciacca C; Raven G; Snoek HL; Jessop CP; Knoepfel KJ; LoSecco JM; Wang WF; Honscheid K; Kass R; Brau J; Frey R; Sinev NB; Strom D; Torrence E; Feltresi E; Gagliardi N; Margoni M; Morandin M; Posocco M; Rotondo M; Simonetto F; R. STROILI; Ben-Haim E; Bomben M; Bonneaud GR; Briand H; Calderini G; Chauveau J; Hamon O; Leruste P; Marchiori G; Ocariz J; Sitt S; Biasini M; Manoni E; Rossi A; Angelini C; Batignani G; Bettarini S; Carpinelli M; Casarosa G; Cervelli A; Forti F; Giorgi MA; Lusiani A; Neri N; Oberhof B; Paoloni E; Perez A; Rizzo G; Walsh JJ; Pegna DL; Lu C; Olsen J; Smith AJS; Telnov AV; Anulli F; Cavoto G; Faccini R; Ferrarotto F; Ferroni F; Gaspero M; Gioi LL; Mazzoni MA; Piredda G; Bunger C; Hartmann T; Leddig T; Schroder H; Waldi R; Adye T; Olaiya EO; Wilson FF; Emery S; de Monchenault GH; Vasseur G; Yeche C; Aston D; Bard DJ; Bartoldus R; Benitez JF; Cartaro C; Convery MR; Dorfan J; Dubois-Felsmann GP; Dunwoodie W; Field RC; Sevilla MF; Fulsom BG; Gabareen AM; Graham MT; Grenier P; Hast C; Innes WR; Kelsey MH; Kim H; Kim P; Kocian ML; Leith DWGS; Lewis P; Li S; Lindquist B; Luitz S; Luth V; Lynch HL; MacFarlane DB; Muller DR; Neal H; Nelson S; Ofte I; Perl M; Pulliam T; Ratcliff BN; Roodman A; Salnikov AA; Santoro V; Schindler RH; Snyder A; Su D; Sullivan MK; Va'vra J; Wagner AP; Weaver M; Wisniewski WJ; Wittgen M; Wright DH; Wulsin HW; Yarritu AK; Young CC; Ziegler V; Park W; Purohit MV; White RM; Wilson JR; Randle-Conde A; Sekula SJ; Bellis M; Burchat PR; Miyashita TS; Alam MS; Ernst JA; Gorodeisky R; Guttman N; Peimer DR; Soffer A; Lund P; Spanier SM; Eckmann R; Ritchie JL; Ruland AM; Schilling CJ; Schwitters RF; Wray BC; Izen JM; Lou XC; Bianchi F; Gamba D; Lanceri L; Vitale L; Lopez-March N; Martinez-Vidal F; Oyanguren A; Ahmed H; Albert J; Banerjee S; Choi HHF; King GJ; Kowalewski R; Lewczuk MJ; Lindsay C; Nugent IM; Roney JM; Sobie RJ; Gershon TJ; Harrison PF; Latham TE; Puccio EMT; Band HR; Dasu S; Pan Y; Prepost R; Vuosalo CO; Wu SLLees, Jp; Poireau, V; Prencipe, E; Tisserand, V; Tico, Jg; Grauges, E; Martinelli, M; Milanes, Da; Palano, A; Pappagallo, M; Eigen, G; Stugu, B; Sun, L; Brown, Dn; Kerth, Lt; Kolomensky, Yg; Lynch, G; Koch, H; Schroeder, T; Asgeirsson, Dj; Hearty, C; Mattison, Ts; Mckenna, Ja; Khan, A; Blinov, Ve; Buzykaev, Ar; Druzhinin, Vp; Golubev, Vb; Kravchenko, Ea; Onuchin, Ap; Serednyakov, Si; Skovpen, Yi; Solodov, Ep; Todyshev, Ky; Yushkov, An; Bondioli, M; Curry, S; Kirkby, D; Lankford, Aj; Mandelkern, M; Stoker, Dp; Atmacan, H; Gary, Jw; Liu, F; Long, O; Vitug, Gm; Campagnari, C; Hong, Tm; Kovalskyi, D; Richman, Jd; West, Ca; Eisner, Am; Kroseberg, J; Lockman, Ws; Martinez, Aj; Schalk, T; Schumm, Ba; Seiden, A; Cheng, Ch; Doll, Da; Echenard, B; Flood, Kt; Hitlin, Dg; Ongmongkolkul, P; Porter, Fc; Rakitin, Ay; Andreassen, R; Dubrovin, Ms; Meadows, Bt; Sokoloff, Md; Bloom, Pc; Ford, Wt; Gaz, A; Nagel, M; Nauenberg, U; Smith, Jg; Wagner, Sr; Ayad, R; Toki, Wh; Spaan, B; Kobel, Mj; Schubert, Kr; Schwierz, R; Bernard, D; Verderi, M; Clark, Pj; Playfer, S; Watson, Je; Bettoni, D; Bozzi, C; Calabrese, R; Cibinetto, G; Fioravanti, E; Garzia, I; Luppi, E; Munerato, M; Negrini, M; Piemontese, L; Baldini Ferroli, R; Calcaterra, A; de Sangro, R; Finocchiaro, G; Nicolaci, M; Pacetti, S; Patteri, P; Peruzzi, Im; Piccolo, M; Rama, M; Zallo, A; Contri, R; Guido, E; Lo Vetere, M; Monge, Mr; Passaggio, S; Patrignani, C; Robutti, E; Bhuyan, B; Prasad, V; Lee, Cl; Morii, M; Edwards, Aj; Adametz, A; Marks, J; Uwer, U; Bernlochner, Fu; Ebert, M; Lacker, Hm; Lueck, T; Dauncey, Pd; Tibbetts, M; Behera, Pk; Mallik, U; Chen, C; Cochran, J; Crawley, Hb; Meyer, Wt; Prell, S; Rosenberg, Ei; Rubin, Ae; Gritsan, Av; Guo, Zj; Arnaud, N; Davier, M; Derkach, D; Grosdidier, G; Le Diberder, F; Lutz, Am; Malaescu, B; Roudeau, P; Schune, Mh; Stocchi, A; Wormser, G; Lange, Dj; Wright, Dm; Bingham, I; Chavez, Ca; Coleman, Jp; Fry, Jr; Gabathuler, E; Hutchcroft, De; Payne, Dj; Touramanis, C; Bevan, Aj; Di Lodovico, F; Sacco, R; Sigamani, M; Cowan, G; Paramesvaran, S; Brown, Dn; Davis, Cl; Denig, Ag; Fritsch, M; Gradl, W; Hafner, A; Alwyn, Ke; Bailey, D; Barlow, Rj; Jackson, G; Lafferty, Gd; Cenci, R; Hamilton, B; Jawahery, A; Roberts, Da; Simi, Gabriele; Dallapiccola, C; Salvati, E; Cowan, R; Dujmic, D; Sciolla, G; Lindemann, D; Patel, Pm; Robertson, Sh; Schram, M; Biassoni, P; Lazzaro, A; Lombardo, V; Palombo, F; Stracka, S; Cremaldi, L; Godang, R; Kroeger, R; Sonnek, P; Summers, Dj; Nguyen, X; Taras, P; De Nardo, G; Monorchio, D; Onorato, G; Sciacca, C; Raven, G; Snoek, Hl; Jessop, Cp; Knoepfel, Kj; Losecco, Jm; Wang, Wf; Honscheid, K; Kass, R; Brau, J; Frey, R; Sinev, Nb; Strom, D; Torrence, E; Feltresi, E; Gagliardi, N; Margoni, Martino; Morandin, M; Posocco, M; Rotondo, M; Simonetto, Franco; Stroili, Roberto; Ben Haim, E; Bomben, M; Bonneaud, Gr; Briand, H; Calderini, G; Chauveau, J; Hamon, O; Leruste, P; Marchiori, G; Ocariz, J; Sitt, S; Biasini, M; Manoni, E; Rossi, A; Angelini, C; Batignani, G; Bettarini, S; Carpinelli, M; Casarosa, G; Cervelli, A; Forti, F; Giorgi, Ma; Lusiani, A; Neri, N; Oberhof, B; Paoloni, E; Perez, A; Rizzo, G; Walsh, Jj; Pegna, Dl; Lu, C; Olsen, J; Smith, Ajs; Telnov, Av; Anulli, F; Cavoto, G; Faccini, R; Ferrarotto, F; Ferroni, F; Gaspero, M; Gioi, Ll; Mazzoni, Ma; Piredda, G; Bunger, C; Hartmann, T; Leddig, T; Schroder, H; Waldi, R; Adye, T; Olaiya, Eo; Wilson, Ff; Emery, S; de Monchenault, Gh; Vasseur, G; Yeche, C; Aston, D; Bard, Dj; Bartoldus, R; Benitez, Jf; Cartaro, C; Convery, Mr; Dorfan, J; Dubois Felsmann, Gp; Dunwoodie, W; Field, Rc; Sevilla, Mf; Fulsom, Bg; Gabareen, Am; Graham, Mt; Grenier, P; Hast, C; Innes, Wr; Kelsey, Mh; Kim, H; Kim, P; Kocian, Ml; Leith, Dwgs; Lewis, P; Li, S; Lindquist, B; Luitz, S; Luth, V; Lynch, Hl; Macfarlane, Db; Muller, Dr; Neal, H; Nelson, S; Ofte, I; Perl, M; Pulliam, T; Ratcliff, Bn; Roodman, A; Salnikov, Aa; Santoro, V; Schindler, Rh; Snyder, A; Su, D; Sullivan, Mk; Va'Vra, J; Wagner, Ap; Weaver, M; Wisniewski, Wj; Wittgen, M; Wright, Dh; Wulsin, Hw; Yarritu, Ak; Young, Cc; Ziegler, V; Park, W; Purohit, Mv; White, Rm; Wilson, Jr; Randle Conde, A; Sekula, Sj; Bellis, M; Burchat, Pr; Miyashita, Ts; Alam, Ms; Ernst, Ja; Gorodeisky, R; Guttman, N; Peimer, Dr; Soffer, A; Lund, P; Spanier, Sm; Eckmann, R; Ritchie, Jl; Ruland, Am; Schilling, Cj; Schwitters, Rf; Wray, Bc; Izen, Jm; Lou, Xc; Bianchi, F; Gamba, D; Lanceri, L; Vitale, L; Lopez March, N; Martinez Vidal, F; Oyanguren, A; Ahmed, H; Albert, J; Banerjee, S; Choi, Hhf; King, Gj; Kowalewski, R; Lewczuk, Mj; Lindsay, C; Nugent, Im; Roney, Jm; Sobie, Rj; Gershon, Tj; Harrison, Pf; Latham, Te; Puccio, Emt; Band, Hr; Dasu, S; Pan, Y; Prepost, R; Vuosalo, Co; Wu, S
The Physics of the B Factories
This work is on the Physics of the B Factories. Part A of this book contains a brief description of the SLAC and KEK B Factories as well as their detectors, BaBar and Belle, and data taking related issues. Part B discusses tools and methods used by the experiments in order to obtain results. The results themselves can be found in Part C
B0 meson decays to rho0 K*0, f0 K*0, and rho-K*+, including higher K* resonances
We present branching fraction measurements for the decays B0 -> rho0 K*0, B0
-> f0 K*0, and B0 -> rho- K*+, where K* is an S-wave (K pi)_0* or a K*(892)
meson; we also measure B0 -> f0 K_2*(1430)^0. For the K*(892) channels, we
report measurements of longitudinal polarization fractions (for rho final
states) and direct CP-violation asymmetries. These results are obtained from a
sample of (471.0 +/- 2.8) x 10^6 BBbar pairs collected with the BaBar detector
at the PEP-II asymmetric-energy e+ e- collider at the SLAC National Accelerator
Laboratory. We observe rho0 K*(892)^0, rho0 (K pi)_0^{*0}, f0 K*(892)^0, and
rho- K*(892)+ with greater than 5 sigma significance, including systematics. We
report first evidence for f0 (K pi)_0^{*0} and f0 K_2*(1430)^0, and place an
upper limit on rho- (K pi)_0^{*+}. Our results in the K*(892) channels are
consistent with no direct CP-violation.Comment: 17 pages, 6 postscript figures, submitted to Phys. Rev.
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