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：

中国国家自然科学基金; 美国国家科学基金会; 美国能源部; 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; 瑞典研究理事会; 英国科学技术设施理事会; 芬兰科学院;

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

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