Search for a third-generation leptoquark coupled to a τ lepton and a b quark through single, pair, and nonresonant production in proton-proton collisions at √s=13 TeV

被引：0

作者：

Hayrapetyan, A. ^{[1
]}

Tumasyan, A. ^{[1
]}

Adam, W. ^{[2
]}

Andrejkovic, J. W. ^{[2
]}

Bergauer, T. ^{[2
]}

Chatterjee, S. ^{[2
,61
]}

Damanakis, K. ^{[2
]}

Dragicevic, M. ^{[2
]}

Del Valle, A. Escalante ^{[2
]}

Hussain, P. S. ^{[2
]}

Jeitler, M. ^{[2
,206
]}

Krammer, N. ^{[2
]}

Liko, D. ^{[2
]}

Mikulec, I. ^{[2
]}

Schieck, J. ^{[2
,206
]}

Schofbeck, R. ^{[2
]}

Schwarz, D. ^{[2
]}

Sonawane, M. ^{[2
]}

Templ, S. ^{[2
]}

Waltenberger, W. ^{[2
]}

Wulz, C. -E. ^{[2
,206
]}

Darwish, M. R. ^{[3
,207
]}

Janssen, T. ^{[3
]}

Van Mechelen, P. ^{[3
]}

Bols, E. S. ^{[4
]}

D'Hondt, J. ^{[4
]}

Dansana, S. ^{[4
]}

De Moor, A. ^{[4
]}

Delcourt, M. ^{[4
]}

El Faham, H. ^{[4
]}

Lowette, S. ^{[4
]}

Makarenko, I. ^{[4
]}

Muller, D. ^{[4
]}

Sahasransu, A. R. ^{[4
]}

Tavernier, S. ^{[4
]}

Tytgat, M. ^{[4
,6
]}

Van Putte, S. ^{[4
]}

Vannerom, D. ^{[4
]}

Clerbaux, B. ^{[5
]}

De Lentdecker, G. ^{[5
]}

Favart, L. ^{[5
]}

Hohov, D. ^{[5
]}

Jaramillo, J. ^{[5
]}

Khalilzadeh, A. ^{[5
]}

Lee, K. ^{[5
,107
]}

Mahdavikhorrami, M. ^{[5
]}

Malara, A. ^{[5
]}

Paredes, S. ^{[5
]}

Petre, L. ^{[5
]}

Postiau, N. ^{[5
]}

机构：

[1] Yerevan Phys Inst, Yerevan, Armenia

[2] Inst Hochenergiephys, Vienna, Austria

[3] Univ Antwerp, Antwerp, Belgium

[4] Vrije Univ Brussel, Brussels, Belgium

[5] Univ Libre Bruxelles, Brussels, Belgium

[6] Univ Ghent, Ghent, Belgium

[7] Catholic Univ Louvain, Louvain, Belgium

[8] Ctr Brasileiro Pesquisas Fis, Rio De Janeiro, Brazil

[9] Univ Estado Rio De Janeiro, Rio De Janeiro, Brazil

[10] Univ Fed ABC, Univ Estadual Paulista, Sao Paulo, Peoples R China

[11] Bulgarian Acad Sci, Inst Nucl Res & Nucl Energy, Sofia, Bulgaria

[12] Univ Sofia, Sofia, Bulgaria

[13] Univ Tarapaca, Inst Alta Invest, Casilla 7 D, Arica, Chile

[14] Beihang Univ, Beijing, Peoples R China

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

[16] Inst High Energy Phys, Beijing, Peoples R China

[17] Peking Univ, State Key Lab Nucl Phys & Technol, Beijing, Peoples R China

[18] Sun Yat Sen Univ, Guangzhou, Peoples R China

[19] Univ Sci & Technol China, Hefei, Peoples R China

[20] Fudan Univ, Key Lab Nucl Phys & Ionbeam Applicat MOE, Shanghai, Peoples R China

[21] Fudan Univ, Inst Modern Phys, Shanghai, Peoples R China

[22] Zhejiang Univ, Hangzhou, Zhejiang, Peoples R China

[23] Univ Los Andes, Bogota, Colombia

[24] Univ Antioquia, Medellin, Colombia

[25] Univ Split, Fac Elect Engn Mech Engn & Naval Architecture, Split, Croatia

[26] Univ Split, Fac Sci, Split, Croatia

[27] Inst Rudjer Boskov, Zagreb, Croatia

[28] Univ Cyprus, Nicosia, Cyprus

[29] Charles Univ Prague, Prague, Czech Republic

[30] Escuela Politec Nacl, Quito, Ecuador

[31] Univ San Francisco De Quito, Quito, Ecuador

[32] Acad Sci Res & Technol Arab Republ Egypt, Egyptian Network High Energy Phys, Cairo, Egypt

[33] Fayoum Univ, Ctr High Energy Phys CHEP FU, Al Fayyum, Egypt

[34] NICPB, Tallinn, Estonia

[35] Univ Helsinki, Dept Phys, Helsinki, Finland

[36] Helsinki Inst Phys, Helsinki, Finland

[37] Lappeenranta Lahti Univ Technol, Lappeenranta, Finland

[38] Univ Paris Saclay, IRFU, CEA, Gif Sur Yvette, France

[39] Inst Polytech Paris, Ecole Polytechn, CNRS, Lab Leprince Ringuet,IN2P3, Palaiseau, France

[40] Univ Strasbourg, CNRS, IPHC, UMR 7178, Strasbourg, France

[41] Inst Phys 2 Infinis Lyon IP2I, Villeurbanne, France

[42] Georgian Tech Univ, Tbilisi, Georgia

[43] Rhein Westfal TH Aachen, Phys Inst 1, Aachen, Germany

[44] Rhein Westfal TH Aachen, Phys Inst A 3, Aachen, Germany

[45] Rhein Westfal TH Aachen, Phys Inst B 3, Aachen, Germany

[46] Deutsch Elekt Synchrotron, Hamburg, Germany

[47] Univ Hamburg, Hamburg, Germany

[48] Karlsruher Inst Technol, Karlsruhe, Germany

[49] NCSR Demokritos, Inst Nucl & Particle Phys INPP, Aghia Paraskevi, Greece

[50] Natl & Kapodistrian Univ Athens, Athens, Greece

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2024年 / 05期

关键词：

Beyond Standard Model; Hadron-Hadron Scattering; DECAYS;

D O I：

10.1007/JHEP05(2024)311

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 is presented for a third-generation leptoquark (LQ) coupled exclusively to a tau lepton and a b quark. The search is based on proton-proton collision data at a center-of-mass energy of 13 TeV recorded with the CMS detector, corresponding to an integrated luminosity of 138 fb(-1). Events with tau leptons and a varying number of jets originating from b quarks are considered, targeting the single and pair production of LQs, as well as nonresonant t-channel LQ exchange. An excess is observed in the data with respect to the background expectation in the combined analysis of all search regions. For a benchmark LQ mass of 2 TeV and an LQ-b-tau coupling strength of 2.5, the excess reaches a local significance of up to 2.8 standard deviations. Upper limits at the 95% confidence level are placed on the LQ production cross section in the LQ mass range 0.5-2.3 TeV, and up to 3 TeV for t-channel LQ exchange. Leptoquarks are excluded below masses of 1.22-1.88 TeV for different LQ models and varying coupling strengths up to 2.5. The study of nonresonant tau tau production through t-channel LQ exchange allows lower limits on the LQ mass of up to 2.3 TeV to be obtained.<fig id="Figa" position="anchor"

引用

页数：55

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Kello, T.
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Sfar, H. Rejeb
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Van Putte, S.
Van Remortel, N.
Blekman, F.
Bols, E. S.
Chhibra, S. S.
D'Hondt, J.
De Clercq, J.
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Marchesini, I
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Python, Q.
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PHYSICS LETTERS B, 2020, 806

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