Measurement of differential cross sections of isolated-photon plus heavy-flavour jet production in pp collisions at √s=8 TeV using the ATLAS detector

被引：15

作者：

Aaboudd, M. ^{[192
,194
,195
]}

Aad, G.

Abbott, B. ^{[159
]}

Abdinov, O. ^{[15
]}

Abeloos, B. ^{[163
]}

Abidi, S. H. ^{[226
]}

AbouZeid, O. S. ^{[198
]}

Abraham, N. L. ^{[215
]}

Abramowicz, H. ^{[219
]}

Abreu, H. ^{[218
]}

Abreu, R. ^{[162
]}

Abulaitia, Y. ^{[210
,211
]}

Acharya, B. S. ^{[235
,236
,253
]}

Adachi, S. ^{[221
,222
]}

Adamczyk, L. ^{[65
]}

Adelman, J. ^{[154
]}

Adersberger, M. ^{[143
]}

Adye, T. ^{[184
]}

Affolder, A. A. ^{[198
]}

Afik, Y. ^{[218
]}

Agheorghiesei, C. ^{[44
]}

Aguilar-Saavedra, J. A. ^{[174
,179
]}

Ahlen, S. P. ^{[32
]}

Ahmadov, F. ^{[101
,254
]}

Aiellia, G. ^{[187
,188
]}

Akatsuka, S. ^{[104
]}

Akerstedt, H. ^{[210
,211
]}

Akesson, T. P. A. ^{[123
]}

Akilli, E. ^{[79
]}

Akimov, A. V. ^{[139
]}

Alberghi, G. L. ^{[29
,30
]}

Albert, J. ^{[242
]}

Albicocco, P. ^{[77
]}

Alconada Verzini, M. J. ^{[108
]}

Alderweireldt, S. C. ^{[151
]}

Aleksa, M. ^{[48
]}

Aleksandrov, I. N. ^{[101
]}

Alexa, C. ^{[40
]}

Alexander, G. ^{[219
]}

Alexopoulos, T. ^{[13
]}

Alhroob, M. ^{[159
]}

Ali, B. ^{[181
]}

Aliev, M. ^{[111
,112
]}

Alimonti, G. ^{[134
]}

Alison, J.

Alkire, S. P.

Allbrooke, B. M. M. ^{[215
]}

Allen, W. ^{[162
]}

Allport, P. P. ^{[24
]}

Aloisio, A. ^{[70
,71
,148
,149
]}

机构：

[1] Univ Adelaide, Dept Phys, Adelaide, SA, Australia

[2] SUNY Albany, Dept Phys, Albany, NY 12222 USA

[3] Univ Alberta, Dept Phys, Edmonton, AB, Canada

[4] Ankara Univ, Dept Phys, Ankara, Turkey

[5] Istanbul Aydin Univ, Istanbul, Turkey

[6] TOBB Univ Econ & Technol, Div Phys, Ankara, Turkey

[7] CNRS, IN2P3, LAPP, Annecy Le Vieux, France

[8] Univ Savoie Mont Blanc, Annecy Le Vieux, France

[9] Argonne Natl Lab, Div High Energy Phys, Argonne, IL 60439 USA

[10] Univ Arizona, Dept Phys, Tucson, AZ 85721 USA

[11] Univ Texas Arlington, Dept Phys, POB 19059, Arlington, TX 76019 USA

[12] Natl & Kapodistrian Univ Athens, Dept Phys, Athens, Greece

[13] Natl Tech Univ Athens, Dept Phys, Zografos, Greece

[14] Univ Texas Austin, Dept Phys, Austin, TX 78712 USA

[15] Azerbaijan Acad Sci, Inst Phys, Baku, Azerbaijan

[16] Barcelona Inst Sci & Technol, IFAE, Barcelona, Spain

[17] Univ Belgrade, Inst Phys, Belgrade, Serbia

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

[19] Lawrence Berkeley Natl Lab, Phys Div, Berkeley, CA USA

[20] Univ Calif Berkeley, Berkeley, CA 94720 USA

[21] Humboldt Univ, Dept Phys, Berlin, Germany

[22] Univ Bern, Albert Einstein Ctr Fundamental Phys, Bern, Switzerland

[23] Univ Bern, High Energy Phys Lab, Bern, Switzerland

[24] Univ Birmingham, Sch Phys & Astron, Birmingham, W Midlands, England

[25] Bogazici Univ, Dept Phys, Istanbul, Turkey

[26] Gaziantep Univ, Dept Engn Phys, Gaziantep, Turkey

[27] Istanbul Bilgi Univ, Fac Engn & Nat Sci, Istanbul, Turkey

[28] Univ Antonio Narino, Ctr Invest, Bogota, Colombia

[29] INFN, Sez Bologna, Bologna, Italy

[30] Univ Bologna, Dipartimento Fis & Astron, Bologna, Italy

[31] Univ Bonn, Phys Inst, Bonn, Germany

[32] Boston Univ, Dept Phys, 590 Commonwealth Ave, Boston, MA 02215 USA

[33] Brandeis Univ, Dept Phys, Waltham, MA 02254 USA

[34] Univ Fed Rio De Janeiro, COPPE, EE, IF, Rio De Janeiro, Brazil

[35] Univ Fed Juiz de Fora, Elect Circuits Dept, Juiz de Fora, Brazil

[36] Univ Fed Sao Joao del Rei, Sao Joao del Rei, Brazil

[37] Univ Sao Paulo, Inst Fis, Sao Paulo, Brazil

[38] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA

[39] Transilvania Univ Brasov, Brasov, Romania

[40] Horia Hulubei Natl Inst Phys & Nucl Engn, Bucharest, Romania

[41] Alexandru Ioan Cuza Univ, Dept Phys, Iasi, Romania

[42] Natl Inst Res & Dev Isotop & Mol Technol, Dept Phys, Cluj Napoca, Romania

[43] Univ Politehn Bucuresti, Bucharest, Romania

[44] West Univ Timisoara, Timisoara, Romania

[45] Univ Buenos Aires, Dept Fis, Buenos Aires, DF, Argentina

[46] Univ Cambridge, Cavendish Lab, Cambridge, England

[47] Carleton Univ, Dept Phys, Ottawa, ON, Canada

[48] CERN, Geneva, Switzerland

[49] Univ Chicago, Enrico Fermi Inst, 5640 S Ellis Ave, Chicago, IL 60637 USA

[50] Pontificia Univ Catolica Chile, Dept Fis, Santiago, Chile

来源：

PHYSICS LETTERS B | 2018年 / 776卷

基金：

巴西圣保罗研究基金会; 加拿大自然科学与工程研究理事会; 美国国家科学基金会;

关键词：

INTRINSIC CHARM; SHOWERS;

D O I：

10.1016/j.physletb.2017.11.054

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

This Letter presents the measurement of differential cross sections of isolated prompt photons produced in association with a b-jet or a c-jet. These final states provide sensitivity to the heavy-flavour content of the proton and aspects related to the modelling of heavy-flavour quarks in perturbative QCD. The measurement uses proton-proton collision data at a centre-of-mass energy of 8 TeV recorded by the ATLAS detector at the LHC in 2012 corresponding to an integrated luminosity of up to 20.2 fb(-1). The differential cross sections are measured for each jet flavour with respect to the transverse energy of the leading photon in two photon pseudorapidity regions: vertical bar eta(gamma)vertical bar < 1.37 and 1.56 < vertical bar eta(gamma)vertical bar < 2.37. The measurement covers photon transverse energies 25 < E-T(gamma) < 400 GeV and 25 < E-T(gamma) < 350 GeV respectively for the two vertical bar eta(gamma)vertical bar regions. For each jet flavour, the ratio of the cross sections in the two vertical bar eta(gamma)vertical bar regions is also measured. The measurement is corrected for detector effects and compared to leading-order and next-to-leading-order perturbative QCD calculations, based on various treatments and assumptions about the heavy-flavour content of the proton. Overall, the predictions agree well with the measurement, but some deviations are observed at high photon transverse energies. The total uncertainty in the measurement ranges between 13% and 66%, while the central gamma+b measurement exhibits the smallest uncertainty, ranging from 13% to 27%, which is comparable to the precision of the theoretical predictions. (c) 2017 The Author. Published by Elsevier B.V.

引用

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页码：295 / 317

页数：23

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