Measurement of prompt J/ψ and beauty hadron production cross sections at mid-rapidity in pp collisions at √s=7 TeV

被引：0

作者：

Abelev, Betty ^{[1
]}

Adam, Jaroslav ^{[47
]}

Adamova, Dagmar ^{[88
]}

Adare, Andrew Marshall ^{[126
]}

Aggarwal, Madan ^{[92
]}

Rinella, Gianluca Aglieri ^{[43
]}

Agocs, Andras Cabor ^{[76
]}

Agostinelli, Andrea ^{[28
,29
]}

Salazar, Saul Aguilar ^{[72
]}

Ahammed, Zubayer ^{[122
]}

Ahmad, Arshad ^{[17
]}

Ahmad, Nazeer ^{[17
]}

Ahn, Sul-Ah ^{[78
]}

Ahn, Sang Un ^{[50
,79
]}

Akindinov, Alexander ^{[62
]}

Aleksandrov, Dmitry ^{[104
]}

Alessandro, Bruno ^{[37
]}

Alfaro Molina, Jose Ruben ^{[72
]}

Alici, Andrea ^{[11
,12
,29
]}

Alkin, Anton ^{[3
]}

Almaraz Avina, Erick Jonathan ^{[72
]}

Alme, Johan ^{[45
]}

Alt, Torsten ^{[49
]}

Altini, Valerio ^{[40
,41
]}

Altinpinar, Sedat ^{[18
]}

Altsybeev, Igor ^{[123
]}

Andrei, Cristian ^{[85
]}

Andronic, Anton ^{[100
,101
]}

Anguelov, Venelin ^{[97
]}

Anielski, Jonas ^{[70
]}

Anson, Christopher Daniel ^{[19
]}

Anticic, Tome ^{[102
]}

Antinori, Federico ^{[25
]}

Antonioli, Pietro ^{[29
]}

Aphecetche, Laurent Bernard ^{[94
]}

Appelshauser, Harald ^{[68
]}

Arbor, Nicolas ^{[80
]}

Arcelli, Silvia ^{[28
,29
]}

Arend, Andreas ^{[68
]}

Armesto, Nestor ^{[15
,16
]}

Arnaldi, Roberta ^{[37
]}

Aronsson, Tomas Robert ^{[126
]}

Arsene, Ionut Cristian ^{[100
,101
]}

Arslandok, Mesut ^{[68
]}

Asryan, Andzhey ^{[123
]}

Augustinus, Andre ^{[43
]}

Averbeck, Ralf Peter ^{[100
,101
]}

Awes, Terry ^{[89
]}

Aysto, Juha Heikki ^{[51
,52
]}

Azmi, Mohd Danish ^{[17
]}

机构：

[1] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

[2] Benemerita Univ Autonoma Puebla, Puebla, Mexico

[3] Bogolyubov Inst Theoret Phys, Kiev, Ukraine

[4] Budker Inst Nucl Phys, Novosibirsk 630090, Russia

[5] Calif Polytech State Univ San Luis Obispo, San Luis Obispo, CA 93407 USA

[6] Ctr Calcul lIN2P3, Villeurbanne, France

[7] Ctr Aplicac Tecnol & Desarrollo Nucl CEADEN, Havana, Cuba

[8] Ctr Invest Energet Medioambientales & Tecnol CIEM, Madrid, Spain

[9] Ctr Invest & Estudios Avanzados CINVESTAV, Mexico City, DF, Mexico

[10] Ctr Invest & Estudios Avanzados CINVESTAV, Merida, Mexico

[11] Ctr Studi & Ric, Ctr Fermi, Rome, Italy

[12] Museo Stor Fis Enrico Fermi, Rome, Italy

[13] Chicago State Univ, Chicago, IL USA

[14] IRFU, Commissariat Energie Atom, Saclay, France

[15] Univ Santiago de Compostela, Dept Fis Particulas, Santiago De Compostela, Spain

[16] Univ Santiago de Compostela, IGFAE, Santiago De Compostela, Spain

[17] Aligarh Muslim Univ, Dept Phys, Aligarh 202002, Uttar Pradesh, India

[18] Univ Bergen, Dept Phys & Technol, Bergen, Norway

[19] Ohio State Univ, Dept Phys, Columbus, OH 43210 USA

[20] Sejong Univ, Dept Phys, Seoul, South Korea

[21] Univ Oslo, Dept Phys, Oslo, Norway

[22] Univ Cagliari, Dipartimento Fis, Cagliari, Italy

[23] Sezione Ist Nazl Fis Nucl, Cagliari, Italy

[24] Univ Padua, Dipartimento Fis, Padua, Italy

[25] Sezione Ist Nazl Fis Nucl, Padua, Italy

[26] Univ Trieste, Dipartimento Fis, Trieste, Italy

[27] Sezione Ist Nazl Fis Nucl, Trieste, Italy

[28] Univ Bologna, Dipartimento Fis, Bologna, Italy

[29] Sezione Ist Nazl Fis Nucl, Bologna, Italy

[30] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy

[31] Sezione Ist Nazl Fis Nucl, Rome, Italy

[32] Univ Catania, Dipartimento Fis & Astron, Catania, Italy

[33] Sezione Ist Nazl Fis Nucl, Catania, Italy

[34] Univ Salerno, Dipartimento Fis ER Caianiello, I-84100 Salerno, Italy

[35] Grp Collegato INFN, Salerno, Italy

[36] Univ Turin, Dipartimento Fis Sperimentale, Turin, Italy

[37] Sezione Ist Nazl Fis Nucl, Turin, Italy

[38] Univ Piemonte Orientale, Dipartimento Sci & Innovaz Tecnol, Alessandria, Italy

[39] Grp Collegato INFN, Alessandria, Italy

[40] Dipartimento Interateneo Fis M Merlin, Bari, Italy

[41] Sezione Ist Nazl Fis Nucl, Bari, Italy

[42] Lund Univ, Div Expt High Energy Phys, Lund, Sweden

[43] European Org Nucl Res CERN, Geneva, Switzerland

[44] Fachhsch Koln, Cologne, Germany

[45] Bergen Univ Coll, Fac Engn, Bergen, Norway

[46] Comenius Univ, Fac Math Phys & Informat, Bratislava, Slovakia

[47] Czech Tech Univ, Fac Nucl Sci & Phys Engn, CR-16635 Prague, Czech Republic

[48] Safarik Univ, Fac Sci, Kosice, Slovakia

[49] Goethe Univ Frankfurt, Frankfurt Inst Adv Studies, Frankfurt, Germany

[50] Gangneung Wonju Natl Univ, Kangnung, South Korea

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2012年 / 11期

基金：

瑞典研究理事会; 美国国家科学基金会; 新加坡国家研究基金会; 巴西圣保罗研究基金会; 欧洲研究理事会; 芬兰科学院; 美国能源部; 英国科学技术设施理事会; 中国国家自然科学基金;

关键词：

Hadron-Hadron Scattering; QED RADIATIVE-CORRECTIONS; UNIVERSAL MONTE-CARLO; P(P)OVER-BAR COLLISIONS; QUARK PRODUCTION; D-SIGMA/DP(T); DECAYS; PHOTOS; MESON;

D O I：

10.1007/JHEP11(2012)065

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

The ALICE experiment at the LHC has studied J/psi production at mid-rapidity in pp collisions at root s = 7 TeV through its electron pair decay on a data sample corresponding to an integrated luminosity L-int = 5.6 nb(-1). The fraction of J/psi from the decay of long-lived beauty hadrons was determined for J/psi candidates with transverse momentum p(t) > 1,3 GeV/c and rapidity vertical bar y vertical bar < 0.9. The cross section for prompt J/psi mesons, i.e. directly produced J/psi and prompt decays of heavier charmonium states such as the psi(2S) and chi(c) resonances, is sigma(prompt J/psi) (p(t) > 1.3 GeV/c, vertical bar y vertical bar < 0.9) = 8.3 +/- 0.8(stat.) +/- 1.1 (syst.)(-1.4)(+1.5) (syst. pol.) mu b. The cross section for the production of b-hadrons decaying to J/psi with p(t) > 1.3 GeV/c and vertical bar y vertical bar < 0.9 is a sigma(J/psi <- hB) (p(t) > 1.3 GeV/c, vertical bar y vertical bar < 0.9) = 1.46 +/- 0.38 (stat.)(-0.32)(+0.26) (syst.) mu b. The results are compared to QCD model predictions. The shape of the p(t) and y distributions of b-quarks predicted by perturbative QCD model calculations are used to extrapolate the measured cross section to derive the b (b) over bar pair total cross section and d sigma/dy at mid-rapidity.

引用

页数：31

共 50 条

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Bergauer, T.
Dragicevic, M.
Eroe, J.
Friedl, M.
Fruehwirth, R.
Ghete, V. M.
Hartl, C.
Hoermann, N.
Hrubec, J.
Jeitler, M.
Kiesenhofer, W.
Knuenz, V.
Krammer, M.
Kraetschmer, I.
Liko, D.
Mikulec, I.
Rabady, D.
Rahbaran, B.
Rohringer, H.
Schoefbeck, R.
Strauss, J.
Treberer-Treberspurg, W.
Waltenberger, W.
Wulz, C. -E.
Mossolov, V.
Shumeiko, N.
Gonzalez, J. Suarez
Alderweireldt, S.
Bansal, S.
Cornelis, T.
De Wolf, E. A.
Janssen, X.
Knutsson, A.
Lauwers, J.
Luyckx, S.
Ochesanu, S.
Rougny, R.
Van De Klundert, M.
Van Haevermaet, H.
Van Mechelen, P.
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