Measurements of b-jet tagging efficiency with the ATLAS detector using t(t)over-bar events at √s=13 TeV

被引：0

作者：

Aaboud, M. ^{[54
,55
]}

Aad, G. ^{[154
]}

Abbott, B. ^{[182
]}

Abdinov, O. ^{[18
]}

Abeloos, B. ^{[186
]}

Abhayasinghe, D. K. ^{[145
]}

Abidi, S. H. ^{[231
]}

AbouZeid, O. S. ^{[206
]}

Abraham, N. L. ^{[218
]}

Abramowicz, H. ^{[224
]}

Abreu, H. ^{[223
]}

Abulaiti, Y. ^{[8
]}

Acharya, B. S. ^{[100
,101
,260
]}

Adachi, S. ^{[226
,227
]}

Adamczyk, L. ^{[131
]}

Adelman, J. ^{[176
]}

Adersberger, M. ^{[167
]}

Adiguzel, A. ^{[16
,270
]}

Adye, T. ^{[204
]}

Affolder, A. A. ^{[206
]}

Afik, Y. ^{[223
]}

Agheorghiesei, C. ^{[40
]}

Aguilar-Saavedra, J. A. ^{[194
,199
]}

Ahmadov, F. ^{[18
,124
]}

Aielli, G. ^{[115
,116
]}

Akatsuka, S. ^{[134
]}

Akesson, T. P. A. ^{[148
]}

Akilli, E. ^{[78
]}

Akimov, A. V. ^{[163
]}

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

Albert, J. ^{[242
]}

Albicocco, P. ^{[74
,75
]}

Verzini, M. J. Alconada ^{[138
,139
]}

Alderweireldt, S. ^{[173
]}

Aleksa, M. ^{[57
]}

Aleksandrov, I. N. ^{[124
]}

Alexa, C. ^{[39
]}

Alexander, G. ^{[224
]}

Alexopoulos, T. ^{[12
]}

Alhroob, M. ^{[182
]}

Ali, B. ^{[201
]}

Alimonti, G. ^{[105
]}

Alison, J. ^{[58
]}

Alkire, S. P. ^{[209
]}

Allaire, C. ^{[186
]}

Allbrooke, B. M. M. ^{[218
]}

Allen, B. W. ^{[185
]}

Allport, P. P. ^{[31
]}

Aloisio, A. ^{[107
,108
]}

Alonso, A. ^{[61
]}

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] Univ Savoie Mont Blanc, Univ Grenoble Alpes, CNRS, LAPP,IN2P3, Annecy, France

[8] Argonne Natl Lab, Div High Energy Phys, 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 Engn Phys, 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, Beijing, 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] West Univ Timisoara, Timisoara, Romania

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

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

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

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

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

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

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

[50] Univ Witwatersrand, Sch Phys, Johannesburg, South Africa

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2018年 / 08期

基金：

加拿大自然科学与工程研究理事会; 欧盟地平线“2020”; 美国国家科学基金会; 巴西圣保罗研究基金会;

关键词：

Hadron-Hadron scattering (experiments); CROSS-SECTION; PLUS PLUS;

D O I：

10.1007/JHEP08(2018)089

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 efficiency to identify jets containing b-hadrons (b-jets) is measured using a high purity sample of dileptonic top quark-antiquark pairs (t (t) over bar) selected from the 36.1 fb(-1) of data collected by the ATLAS detector in 2015 and 2016 from proton-proton collisions produced by the Large Hadron Collider at a centre-of-mass energy root s = 13 TeV. Two methods are used to extract the efficiency from t (t) over bar events, a combinatorial likelihood approach and a tag-and-probe method. A boosted decision tree, not using b-tagging information, is used to select events in which two b-jets are present, which reduces the dominant uncertainty in the modelling of the flavour of the jets. The efficiency is extracted for jets in a transverse momentum range from 20 to 300 GeV, with data-to-simulation scale factors calculated by comparing the efficiency measured using collision data to that predicted by the simulation. The two methods give compatible results, and achieve a similar level of precision, measuring data-to-simulation scale factors close to unity with uncertainties ranging from 2% to 12% depending on the jet transverse momentum.

引用

页数：47

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