Search for a new heavy scalar particle decaying into a Higgs boson and a new scalar singlet in final states with one or two light leptons and a pair of τ-leptons with the ATLAS detector

被引：30

作者：

Aad, G. ^{[159
]}

Abbott, B. ^{[179
]}

Abeling, K. ^{[83
]}

Abicht, N. J. ^{[76
]}

Abidi, S. H. ^{[47
]}

Aboulhorma, A. ^{[27
,60
]}

Abramowicz, H. ^{[224
]}

Abreu, H. ^{[223
]}

Abulaiti, Y. ^{[176
]}

Acharya, B. S. ^{[107
,108
,258
]}

Bourdarios, C. Adam ^{[5
]}

Adamczyk, L. ^{[138
]}

Addepalli, S. V. ^{[38
]}

Addison, M. J. ^{[158
]}

Adelman, J. ^{[174
]}

Adiguzel, A. ^{[30
]}

Adye, T. ^{[198
]}

Affolder, A. A. ^{[200
]}

Afik, Y. ^{[62
]}

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

Agarwala, J. ^{[116
,117
]}

Aggarwal, A. ^{[157
]}

Agheorghiesei, C. ^{[41
]}

Ahmad, A. ^{[62
]}

Ahmadov, F. ^{[62
,269
]}

Ahmed, W. S. ^{[161
]}

Ahuja, S. ^{[151
]}

Ai, X. ^{[91
,92
]}

Aielli, G. ^{[122
,123
]}

Aikot, A. ^{[239
]}

Tamlihat, M. Ait ^{[60
]}

Aitbenchikh, B. ^{[57
]}

Aizenberg, I. ^{[245
]}

Akbiyik, M. ^{[157
]}

Akesson, T. P. A. ^{[154
]}

Akimov, A. V. ^{[62
]}

Akiyama, D. ^{[244
]}

Akolkar, N. N. ^{[36
]}

Al Khoury, K. ^{[65
]}

Alberghi, G. L. ^{[35
]}

Albert, J. ^{[241
]}

Albicocco, P. ^{[80
,81
]}

Albouy, G. L. ^{[89
]}

Alderweireldt, S. ^{[79
]}

Aleksa, M. ^{[62
]}

Aleksandrov, I. N. ^{[62
]}

Alexa, C. ^{[40
]}

Alexopoulos, T. ^{[11
]}

Alfonsi, F. ^{[35
]}

Algren, M. ^{[84
]}

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, CNRS, IN2P3, LAPP, Annecy, France

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

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

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

[9] Univ Texas Arlington, Dept Phys, POB 19059, Arlington, TX 76019 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 78712 USA

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

[14] Barcelona Inst Sci & Technol, Inst Fis Altes 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] Shenzhen Campus Sun Yat Sen Univ, Sch Sci, Beijing, Peoples R China

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

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

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

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

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

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

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

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

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

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

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

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

[31] Univ Antonio Narino, Fac Ciencias, Bogota, Colombia

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

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

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

[35] INFN Sez Bologna, Bologna, Italy

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

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

[38] Brandeis Univ, Dept Phys, Waltham, MA 02254 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 Politeh Bucharest, Bucharest, Romania

[44] West Univ Timisoara, Timisoara, Romania

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

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

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

[48] Univ Buenos Aires, Fac Ciencias Exactas & Nat, Dept Fis, Buenos Aires, DF, Argentina

[49] Univ Buenos Aires, CONICET, Inst Fis Buenos Aires IFIBA, Buenos Aires, DF, Argentina

[50] Calif State Univ Fresno, Fresno, CA 93740 USA

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2023年 / 2023卷 / 10期

基金：

欧盟地平线“2020”; 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;

关键词：

Hadron-Hadron Scattering; PROGRAM; WIDTHS; MASSES;

D O I：

10.1007/JHEP10(2023)009

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：

A search for a new heavy scalar particle X decaying into a Standard Model (SM) Higgs boson and a new singlet scalar particle S is presented. The search uses a proton-proton (pp) collision data sample with an integrated luminosity of 140 fb(-1) recorded at a centre-of-mass energy of root s = 13 TeV with the ATLAS detector at the Large Hadron Collider. The most sensitive mass parameter space is explored in X mass ranging from 500 to 1500 GeV, with the corresponding S mass in the range 200-500 GeV. The search selects events with two hadronically decaying tau-lepton candidates from H -> tau(+)tau(-) decays and one or two light leptons (l = e, mu) from S -> VV (V = W, Z) decays while the remaining V boson decays hadronically or to neutrinos. A multivariate discriminant based on event kinematics is used to separate the signal from the background. No excess is observed beyond the expected SM background and 95% confidence level upper limits between 72 fb and 542 fb are derived on the cross-section sigma(pp -> X -> SH) assuming the same SM-Higgs boson-like decay branching ratios for the S -> VV decay. Upper limits on the visible cross-sections sigma(pp -> X -> SH -> WW tau tau) and sigma(pp -> X -> SH -> ZZ tau tau) are also set in the ranges 3-26 fb and 6-33 fb, respectively.

引用

页数：46

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Ahmed, W. S.
Ai, X.
Aielli, G.
Aizenberg, I.
Akbiyik, M.
Akesson, T. P. A.
Akimov, A. V.
Al Khoury, K.
Alberghi, G. L.
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Albicocco, P.
Alconada Verzini, M. J.
Alderweireldt, S.
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Affolder, A. A.
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Akilli, E.
Akimov, A. V.
Alberghi, G. L.
Albert, J.
Albicocco, P.
Verzini, M. J. Alconada
Alderweireldt, S.
Aleksa, M.
Aleksandrov, I. N.
Alexa, C.
Alexopoulos, T.
Alhroob, M.
Ali, B.
Alimonti, G.
Alison, J.
Alkire, S. P.
Allaire, C.
Allbrooke, B. M. M.
Allen, B. W.
Allport, P. P.
Aloisio, A.
Alonso, A.
Alonso, F.
JOURNAL OF HIGH ENERGY PHYSICS, 2021, (04):

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