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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[29] Search for resonant pair production of Higgs bosons in the bbZZ channel in proton-proton collisions at √s=13 TeV
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Ero, J.
Del Valle, A. Escalante
Fruhwirth, R.
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Krammer, N.
Lechner, L.
Liko, D.
Madlener, T.
Mikulec, I
Rad, N.
Schieck, J.
Schofbeck, R.
Spanring, M.
Templ, S.
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Wulz, C-E
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De Wolf, E. A.
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Sfar, H. Rejeb
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Van Mechelen, P.
Van Putte, S.
Van Remortel, N.
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Chhibra, S. S.
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Python, Q.
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[30] Search for the associated production of a Higgs boson with a single top quark in proton-proton collisions at √s=8 TeV
Khachatryan, V.
Sirunyan, A. M.
Tumasyan, A.
Adam, W.
Asilar, E.
Bergauer, T.
Brandstetter, J.
Brondolin, E.
Dragicevic, M.
Ero, J.
Flechl, M.
Friedl, M.
Fruhwirth, R.
Ghete, V. M.
Hartl, C.
Hormann, N.
Hrubec, J.
Jeitler, M.
Knunz, V.
Konig, A.
Krammer, M.
Kratschmer, I.
Liko, D.
Matsushita, T.
Mikulec, I.
Rabady, D.
Rahbaran, B.
Rohringer, H.
Schieck, J.
Schofbeck, R.
Strauss, J.
Treberer-Treberspurg, W.
Waltenberger, W.
Wulz, C. -E.
Mossolov, V.
Shumeiko, N.
Gonzalez, J. Suarez
Alderweireldt, S.
Cornelis, T.
De Wolf, E. A.
Janssen, X.
Knutsson, A.
Lauwers, J.
Luyckx, S.
Van De Klundert, M.
Van Haevermaet, H.
Van Mechelen, P.
Van Remortel, N.
Van Spilbeeck, A.
Abu Zeid, S.
JOURNAL OF HIGH ENERGY PHYSICS, 2016, (06):

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