Observation of gauge boson joint-polarisation states in W± Z production from pp collisions at √s=13TeV with the ATLAS detector

被引：6

作者：

Aad, G. ^{[155
]}

Abbott, B. ^{[175
]}

Abbott, D. C. ^{[156
]}

Abeling, K. ^{[80
]}

Abidi, S. H. ^{[44
]}

Aboulhorma, A. ^{[57
]}

Abramowicz, H. ^{[219
]}

Abreu, H. ^{[218
]}

Abulaiti, Y. ^{[172
]}

Abusleme Hoffmana, A. C. ^{[198
]}

Acharya, B. S. ^{[103
,104
,258
]}

Achkar, B. ^{[80
]}

Bourdarios, C. Adam ^{[5
]}

Adamczyk, L. ^{[133
]}

Adamek, L. ^{[224
]}

Addepalli, S. V. ^{[35
]}

Adelman, J. ^{[170
]}

Adiguzel, A. ^{[27
]}

Adorni, S. ^{[81
]}

Adye, T. ^{[195
]}

Affolder, A. A. ^{[197
]}

Afik, Y. ^{[58
]}

Agaras, M. N. ^{[14
]}

Agarwala, J. ^{[112
,113
]}

Aggarwal, A. ^{[153
]}

Agheorghiesei, C. ^{[38
]}

Aguilar-Saavedraf, J. A. ^{[190
]}

Ahmad, A. ^{[58
]}

Ahmadov, F. ^{[60
,267
]}

Ahmed, W. S. ^{[157
]}

Ahuja, S. ^{[147
]}

Ai, X. ^{[72
,73
]}

Aielli, G. ^{[118
,119
]}

Aizenberg, I. ^{[240
]}

Akbiyik, M. ^{[153
]}

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

Akimov, A. V. ^{[59
]}

AlKhoury, K. ^{[63
]}

Alberghi, G. L. ^{[32
]}

Albert, J. ^{[236
]}

Albicocco, P. ^{[78
]}

Alderweireldt, S. ^{[77
]}

Aleksa, M. ^{[58
]}

Aleksandrov, I. N. ^{[60
]}

Alexa, C. ^{[37
]}

Alexopoulos, T. ^{[11
]}

Alfonsi, A. ^{[168
,169
]}

Alfonsi, F. ^{[32
]}

Alhroob, M. ^{[175
]}

Ali, B. ^{[193
]}

机构：

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

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

[3] Ankara Univ, Dept Phys, Ankara, Turkiye

[4] TOBB Univ Econ & Technol, Div Phys, Ankara, Turkiye

[5] Univ Savoie Mt Blanc, LAPP, CNRS, IN2P3, Annecy, France

[6] Univ Paris Cite, CNRS, APC, IN2P3, Paris, France

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

[8] Univ Arizona, Dept Phys, Tucson, AZ USA

[9] Univ Texas Arlington, Dept Phys, Arlington, TX USA

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

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

[12] Univ Texas Austin, Dept Phys, Austin, TX USA

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

[14] Barcelona Inst Sci & Technol, Inst Fis dAltes Energies IFAE, Barcelona, Spain

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

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

[17] Nanjing Univ, Dept Phys, Nanjing, Peoples R China

[18] Univ Chinese Acad Sci UCAS, Beijing, Peoples R China

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

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

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

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

[23] Univ Bern, Albert Einstein Ctr Fundamental Phys & Lab High, Bern, Switzerland

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

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

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

[27] Istanbul Univ, Dept Phys, Istanbul, Turkiye

[28] Istinye Univ, Istanbul, Turkiye

[29] Univ Antonio Narino, Fac Ciencias Ctr Investigac, Bogota, Colombia

[30] Univ Nacl Colombia, Dept Fis, Bogota, Colombia

[31] Univ Bologna, Dipartimento Fis & Astron A Righi, Bologna, Italy

[32] INFN, Sez Bologna, Bologna, Italy

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

[34] Boston Univ, Dept Phys, Boston, MA USA

[35] Brandeis Univ, Dept Phys, Waltham, MA USA

[36] Transilvania Univ Brasov, Brasov, Romania

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

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

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

[40] Univ Politehn Bucuresti, Bucharest, Romania

[41] West Univ Timisoara, Timisoara, Romania

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

[43] Slovak Acad Sci, Dept Subnuclear Phys, Inst Expt Phys, Kosice, Slovakia

[44] Brookhaven Natl Lab, Dept Phys, Upton, NY USA

[45] Univ Buenos Aires, Fac Ciencias Exactas Natur, Dept Fis, Buenos Aires, DF, Argentina

[46] Consejo Nacl Invest Cient & Tecn, Inst Fis Buenos Aires IFIBA, Buenos Aires, DF, Argentina

[47] Calif State Univ Los Angeles, Los Angeles, CA USA

[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：

PHYSICS LETTERS B | 2023年 / 843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; 欧盟地平线“2020”;

关键词：

D O I：

10.1016/j.physletb.2023.137895

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Measurements of joint-polarisation states of Wand Zgauge bosons in W +/- Z production are presented. The data set used corresponds to an integrated luminosity of 139fb(-1) of proton-proton collisions at a centre-of-mass energy of 13TeV recorded by the ATLAS detector at the CERN Large Hadron Collider. The W +/- Z candidate events are reconstructed using leptonic decay modes of the gauge bosons into electrons and muons. The simultaneous pair-production of longitudinally polarised vector bosons is measured for the first time with a significance of 7.1 standard deviations. The measured joint helicity fractions integrated over the fiducial region are f(00)= 0.067 +/- 0.010, f(0T) = 0.110 +/- 0.029, f(T0) = 0.179 +/- 0.023 and f(TT) = 0.644 +/- 0.032, in agreement with the next-to-leading-order Standard Model predictions. Individual helicity fractions of the Wand Zbosons are also measured and found to be consistent with joint helicity fractions within the expected amounts of correlation. Both the joint and individual helicity fractions are also measured separately in W+Z and W-Z events. Inclusive and differential cross sections for several kinematic observables sensitive to polarisation are presented. (c) 2023 Published by Elsevier B.V. This is an open access article under the CC BY license (http:// creativecommons.org/licenses/by/4.0/). Funded by SCOAP(3).

引用

页数：27

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