Search for long-lived particles using out-of-time trackless jets in proton-proton collisions at √s=13 TeV

被引：0

作者：

Tumasyan, A. ^{[1
]}

Adam, W. ^{[2
]}

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

Bergauer, T. ^{[2
]}

Chatterjee, S. ^{[2
]}

Damanakis, K. ^{[2
]}

Dragicevic, M. ^{[2
]}

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

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

Jeitler, M. ^{[2
,202
]}

Krammer, N. ^{[2
]}

Lechner, L. ^{[2
]}

Liko, D. ^{[2
]}

Mikulec, I. ^{[2
]}

Paulitsch, P. ^{[2
]}

Pitters, F. M. ^{[2
]}

Schieck, J. ^{[2
,202
]}

Schoefbeck, R. ^{[2
]}

Schwarz, D. ^{[2
]}

Templ, S. ^{[2
]}

Waltenberger, W. ^{[2
]}

Wulz, C. -E. ^{[2
,202
]}

Darwish, M. R. ^{[3
,203
]}

Janssen, T. ^{[3
]}

Kello, T. ^{[3
,5
]}

Sfar, H. Rejeb ^{[3
]}

Van Mechelen, P. ^{[3
]}

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

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

De Moor, A. ^{[4
]}

Delcourt, M. ^{[4
]}

El Faham, H. ^{[4
]}

Lowette, S. ^{[4
]}

Moortgat, S. ^{[4
]}

Morton, A. ^{[4
]}

Mueller, D. ^{[4
]}

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

Tavernier, S. ^{[4
]}

Van Doninck, W. ^{[4
]}

Vannerom, D. ^{[4
]}

Clerbaux, B. ^{[5
]}

De Lentdecker, G. ^{[5
]}

Favart, L. ^{[5
]}

Hohov, D. ^{[5
]}

Jaramillo, J. ^{[5
]}

Lee, K. ^{[5
,106
]}

Mahdavikhorrami, M. ^{[5
]}

Makarenko, I. ^{[5
]}

Malara, A. ^{[5
]}

Paredes, S. ^{[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 La Neuve, 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, Brazil

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

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

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

[22] Univ Los Andes, Bogota, Colombia

[23] Univ Antioquia, Medellin, Colombia

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

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

[26] Inst Rudjer Boskovic, Zagreb, Croatia

[27] Univ Cyprus, Nicosia, Cyprus

[28] Charles Univ Prague, Prague, Czech Republic

[29] Escuela Politec Nacl, Quito, Ecuador

[30] Univ San Francisco Quito, Quito, Ecuador

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

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

[33] NICPB, Tallinn, Estonia

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

[35] Helsinki Inst Phys, Helsinki, Finland

[36] Lappeenranta Lahti Univ Technol, Lappeenranta, Finland

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

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

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

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

[41] Georgian Tech Univ, Tbilisi, Georgia

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

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

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

[45] DESY, Hamburg, Germany

[46] Univ Hamburg, Hamburg, Germany

[47] Karlsruher Inst Technol, Karlsruhe, Germany

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

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

[50] Natl Tech Univ Athens, Athens, Greece

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2023年 / 07期

基金：

欧盟地平线“2020”; 芬兰科学院; 巴西圣保罗研究基金会; 欧洲研究理事会;

关键词：

Beyond Standard Model; Hadron-Hadron Scattering; CROSS-SECTION; SUPERSYMMETRY; HIGGS; DECAYS; SQUARK;

D O I：

10.1007/JHEP07(2023)210

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 long-lived particles decaying in the outer regions of the CMS silicon tracker or in the calorimeters is presented. The search is based on a data sample of proton-proton collisions at root s = 13TeV recorded with the CMS detector at the LHC in 2016-2018, corresponding to an integrated luminosity of 138 fb(-1). A novel technique, using nearly trackless and out-of-time jet information combined in a deep neural network discriminator, is employed to identify decays of long-lived particles. The results are interpreted in a simplified model of chargino-neutralino production, where the neutralino is the next-to-lightest supersymmetric particle, is long-lived, and decays to a gravitino and either a Higgs or Z boson. This search is most sensitive to neutralino proper decay lengths of approximately 0.5 m, for which masses up to 1.18TeV are excluded at 95% confidence level. The current search is the best result to date in the mass range from the kinematic limit imposed by the Higgs boson mass up to 1.8TeV.

引用

页数：52

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D'Hondt, J.
De Clercq, J.
Lontkovskyi, D.
Lowette, S.
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[8] Search for heavy long-lived multicharged particles in proton-proton collisions at √s=13 TeV using the ATLAS detector
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Abbott, B.
Abbott, D. C.
Abdinov, O.
Abeloos, B.
Abhayasinghe, D. K.
Abidi, S. H.
AbouZeid, O. S.
Abraham, N. L.
Abramowicz, H.
Abreu, H.
Abulaiti, Y.
Acharya, B. S.
Adachi, S.
Adam, L.
Adamczyk, L.
Adamek, L.
Adelman, J.
Adersberger, M.
Adiguzel, A.
Adye, T.
Affolder, A. A.
Afik, Y.
Agheorghiesei, C.
Aguilar-Saavedra, J. A.
Ahmadov, F.
Aielli, G.
Akatsuka, S.
Akesson, T. P. A.
Akilli, E.
Akimov, A., V
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Aleksa, M.
Aleksandrov, I. N.
Alexa, C.
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Alhroob, M.
Ali, B.
Alimonti, G.
Alison, J.
Alkire, S. P.
Allaire, C.
Allbrooke, B. M. M.
Allen, B. W.
PHYSICAL REVIEW D, 2019, 99 (05)
[9] Search for disappearing tracks as a signature of new long-lived particles in proton-proton collisions at √s=13 TeV
Sirunyan, A. M.
Tumasyan, A.
Adam, W.
Ambrogi, F.
Asilar, E.
Bergauer, T.
Brandstetter, J.
Brondolin, E.
Dragicevic, M.
Eroe, J.
Del Valle, A. Escalante
Flechl, M.
Fruehwirth, R.
Ghete, V. M.
Hrubec, J.
Jeitler, M.
Krammer, N.
Kraetschmer, I.
Liko, D.
Madlener, T.
Mikulec, I.
Rad, N.
Rohringer, H.
Schieck, J.
Schoefbeck, R.
Spanring, M.
Spitzbart, D.
Taurok, A.
Waltenberger, W.
Wittmann, J.
Wulz, C. -E.
Zarucki, M.
Chekhovsky, V.
Mossolov, V.
Gonzalez, J. Suarez
De Wolf, E. A.
Di Croce, D.
Janssen, X.
Lauwers, J.
Pieters, M.
Van de Klundert, M.
Van Haevermaet, H.
Van Mechelen, P.
Van Remortel, N.
Abu Zeid, S.
Blekman, F.
D'Hondt, J.
De Bruyn, I.
De Clercq, J.
Deroover, K.
JOURNAL OF HIGH ENERGY PHYSICS, 2018, (08):
[10] Search for long-lived particles with displaced vertices in multijet events in proton-proton collisions at √s=13 TeV
Sirunyan, A. M.
Tumasyan, A.
Adam, W.
Ambrogi, F.
Asilar, E.
Bergauer, T.
Brandstetter, J.
Dragicevic, M.
Eroe, J.
Del Valle, A. Escalante
Flechl, M.
Fruehwirth, R.
Ghete, V. M.
Hrubec, J.
Jeitler, M.
Krammer, N.
Kraetschmer, I.
Liko, D.
Madlener, T.
Mikulec, I.
Rad, N.
Rohringer, H.
Schieck, J.
Schoefbeck, R.
Spanring, M.
Spitzbart, D.
Taurok, A.
Waltenberger, W.
Wittmann, J.
Wulz, C. -E.
Zarucki, M.
Chekhovsky, V.
Mossolov, V.
Gonzalez, J. Suarez
De Wolf, E. A.
Di Croce, D.
Janssen, X.
Lauwers, J.
Pieters, M.
Van Haevermaet, H.
Van Mechelen, P.
Van Remortel, N.
Abu Zeid, S.
Blekman, F.
D'Hondt, J.
De Bruyn, I.
De Clercq, J.
Deroover, K.
Flouris, G.
Lontkovskyi, D.
PHYSICAL REVIEW D, 2018, 98 (09):

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