Properties of g → b(b)over-bar at small opening angles in pp collisions with the ATLAS detector at √s=13 TeV

被引：5

作者：

Aaboud, M. ^{[55
,56
,57
]}

Aad, G. ^{[156
]}

Abbott, B. ^{[185
]}

Abbott, D. C. ^{[157
]}

Abdinov, O. ^{[18
]}

Abeloos, B. ^{[189
]}

Abhayasinghe, D. K. ^{[147
]}

Abidi, S. H. ^{[235
]}

AbouZeid, O. S. ^{[63
]}

Abraham, N. L. ^{[222
]}

Abramowicz, H. ^{[228
]}

Abreu, H. ^{[227
]}

Abulaiti, Y. ^{[8
]}

Acharya, B. S. ^{[102
,103
,265
]}

Adachi, S. ^{[230
,231
]}

Adam, L. ^{[154
]}

Adamczyk, L. ^{[133
]}

Adamek, L. ^{[235
]}

Adelman, J. ^{[178
]}

Adersberger, M. ^{[169
]}

Adiguzel, A. ^{[16
,277
]}

Adye, T. ^{[208
]}

Affolder, A. A. ^{[210
]}

Afik, Y. ^{[227
]}

Agapopoulou, C. ^{[189
]}

Agheorghiesei, C. ^{[40
,42
]}

Aguilar-Saavedra, J. A. ^{[197
,202
,203
,204
,276
]}

Ahmadov, F. ^{[18
,126
]}

Aielli, G. ^{[117
,118
]}

Akatsuka, S. ^{[136
]}

Akesson, T. P. A. ^{[150
]}

Akilli, E. ^{[80
]}

Akimov, A., V ^{[165
]}

Alberghi, G. L. ^{[33
,34
]}

Albert, J. ^{[246
]}

Albicocco, P. ^{[76
,77
]}

Alconada Verzini, M. J. ^{[140
,141
]}

Alderweireldt, S. ^{[175
]}

Aleksa, M. ^{[59
]}

Aleksandrov, I. N. ^{[126
]}

Alexa, C. ^{[39
]}

Alexandre, D. ^{[28
]}

Alexopoulos, T. ^{[12
]}

Alhroob, M. ^{[185
]}

Ali, B. ^{[206
]}

Alimonti, G. ^{[107
]}

Alison, J. ^{[60
]}

Alkire, S. P. ^{[213
]}

Allaire, C. ^{[189
]}

Allbrooke, B. M. M. ^{[222
]}

机构：

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

[2] SUNY Albany, Phys Dept, New York, NY 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] Univ Grenoble Alpes, Univ Savoie Mt Blanc, LAPP, CNRS IN2P3, Annecy, France

[8] Argonne Natl Lab, High Energy Phys Div, 9700 S Cass Ave, Argonne, IL 60439 USA

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

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

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

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

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

[14] Bahcesehir Univ, Fac Engn & Nat Sci, Istanbul, Turkey

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

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

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

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

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

[20] Chinese Acad Sci, Inst High Energy Phys, Beijing, Peoples R China

[21] Tsinghua Univ, Phys Dept, Beijing, Peoples R China

[22] Nanjing Univ, Dept Phys, Nanjing, Jiangsu, Peoples R China

[23] UCAS, Beijing, Peoples R China

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

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

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

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

[28] Humboldt Univ, Inst Phys, Berlin, Germany

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

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

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

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

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

[34] INFN, Sez Bologna, Bologna, Italy

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

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

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

[38] Transilvania Univ Brasov, Brasov, Romania

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

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

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

[42] Univ Politehn Bucuresti, Bucharest, Romania

[43] West Univ Timisoara, Timisoara, Romania

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

[45] Slovak Acad Sci, Inst Expt Phys, Dept Subnucl Phys, Kosice, Slovakia

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

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

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

[49] Univ Cape Town, Dept Phys, Cape Town, South Africa

[50] Univ Johannesburg, Dept Mech Engn Sci, Johannesburg, South Africa

来源：

PHYSICAL REVIEW D | 2019年 / 99卷 / 05期

基金：

加拿大自然科学与工程研究理事会; 巴西圣保罗研究基金会;

关键词：

PROTON-PROTON COLLISIONS; PRODUCTION CROSS-SECTION; P(P)OVER-BAR COLLISIONS; QUARK PRODUCTION; ROOT-S; PAIRS; EVENTS; DECAYS; BOSON; MUON;

D O I：

10.1103/PhysRevD.99.052004

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The fragmentation of high-energy gluons at small opening angles is largely unconstrained by present measurements. Gluon splitting to b-quark pairs is a unique probe into the properties of gluon fragmentation because identified b-tagged jets provide a proxy for the quark daughters of the initial gluon. In this study, key differential distributions related to the g -> b (b) over bar process are measured using 33 fb(-1) of root s = 13 TeV pp collision data recorded by the ATLAS experiment at the LHC in 2016. Jets constructed from charged-particle tracks, clustered with the anti-k(t) jet algorithm with radius parameter R = 0.2, are used to probe angular scales below the R = 0.4 jet radius. The observables are unfolded to particle level in order to facilitate direct comparisons with predictions from present and future simulations. Multiple significant differences are observed between the data and parton shower Monte Carlo predictions, providing input to improve these predictions of the main source of background events in analyses involving boosted Higgs bosons decaying into b-quarks.

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