Search for stopped long-lived particles produced in pp collisions at √s=7 TeV

被引：0

作者：

Chatrchyan, S. ^{[1
]}

Khachatryan, V. ^{[1
]}

Sirunyan, A. M. ^{[1
]}

Tumasyan, A. ^{[1
]}

Adam, W. ^{[2
]}

Bergauer, T. ^{[2
]}

Dragicevic, M. ^{[2
]}

Eroe, J. ^{[2
]}

Fabjan, C. ^{[2
,181
]}

Friedl, M. ^{[2
]}

Fruehwirth, R. ^{[2
,181
]}

Ghete, V. M. ^{[2
]}

Hammer, J. ^{[2
]}

Hoermann, N. ^{[2
]}

Hrubec, J. ^{[2
]}

Jeitler, M. ^{[2
]}

Kiesenhofer, W. ^{[2
]}

Knuenz, V. ^{[2
]}

Krammer, M. ^{[2
,181
]}

Liko, D. ^{[2
]}

Mikulec, I. ^{[2
]}

Pernicka, M. ^{[2
]}

Rahbaran, B. ^{[2
]}

Rohringer, C. ^{[2
]}

Rohringer, H. ^{[2
]}

Schoefbeck, R. ^{[2
]}

Strauss, J. ^{[2
]}

Taurok, A. ^{[2
]}

Wagner, P. ^{[2
]}

Waltenberger, W. ^{[2
]}

Walzel, G. ^{[2
]}

Widl, E. ^{[2
]}

Wulz, C. -E. ^{[2
,181
]}

Mossolov, V. ^{[3
]}

Shumeiko, N. ^{[3
]}

Gonzalez, J. Suarez ^{[3
]}

Bansal, S. ^{[4
]}

Cornelis, T. ^{[4
]}

De Wolf, E. A. ^{[4
]}

Janssen, X. ^{[4
]}

Luyckx, S. ^{[4
]}

Maes, T. ^{[4
]}

Mucibello, L. ^{[4
]}

Ochesanu, S. ^{[4
]}

Roland, B. ^{[4
]}

Rougny, R. ^{[4
]}

Selvaggi, M. ^{[4
]}

Staykova, Z. ^{[4
]}

Van Haevermaet, H. ^{[4
]}

Van Mechelen, P. ^{[4
]}

机构：

[1] Yerevan Phys Inst, Yerevan 375036, Armenia

[2] Inst Hochenergiephys OeAW, Vienna, Austria

[3] Natl Ctr Particle & High Energy Phys, Minsk, BELARUS

[4] Univ Antwerp, Antwerp, Belgium

[5] Vrije Univ Brussel, Brussels, Belgium

[6] Univ Libre Bruxelles, Brussels, Belgium

[7] Univ Ghent, B-9000 Ghent, Belgium

[8] Catholic Univ Louvain, B-3000 Louvain, Belgium

[9] Univ Mons, B-7000 Mons, Belgium

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

[11] Univ Estado Rio de Janeiro, Rio De Janeiro, Brazil

[12] Univ Estadual Paulista, Inst Fis Teor, BR-01405 Sao Paulo, Brazil

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

[14] Univ Sofia, BU-1126 Sofia, Bulgaria

[15] Inst High Energy Phys, Beijing 100039, Peoples R China

[16] Peking Univ, State Key Lab Nucl Phys & Tech, Beijing 100871, Peoples R China

[17] Univ Los Andes, Bogota, Colombia

[18] Tech Univ Split, Split, Croatia

[19] Univ Split, Split, Croatia

[20] Rudjer Boskovic Inst, Zagreb, Croatia

[21] Univ Cyprus, Nicosia, Cyprus

[22] Charles Univ Prague, Prague, Czech Republic

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

[24] NICPB, Tallinn, Estonia

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

[26] Helsinki Inst Phys, Helsinki, Finland

[27] Lappeenranta Univ Technol, Lappeenranta, Finland

[28] CEA Saclay, DSM IRFU, F-91191 Gif Sur Yvette, France

[29] Ecole Polytech, CNRS, Lab Leprince Ringuet, IN2P3, F-91128 Palaiseau, France

[30] Univ Haute Alsace Mulhouse, Inst Pluridisciplinaire Hubert Curien, Univ Strasbourg, CNRS,IN2P3, Strasbourg, France

[31] Ctr Calcul, Inst Natl Phys Nucl & Phys Particules, IN2P3, Villeurbanne, France

[32] Univ Lyon 1, CNRS, IN2P3, Inst Phys Nucl Lyon, F-69622 Villeurbanne, France

[33] Tbilisi State Univ, Inst High Energy Phys & Informatizat, GE-380086 Tbilisi, Georgia

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

[35] Rhein Westfal TH Aachen, Physikal Inst A 3, Aachen, Germany

[36] Rhein Westfal TH Aachen, Phy Inst B 3, Aachen, Germany

[37] Deutsch Elekt Synchrotron, Hamburg, Germany

[38] Univ Hamburg, Hamburg, Germany

[39] Univ Karlsruhe, Inst Expt Kernphys, D-7500 Karlsruhe, Germany

[40] Inst Nucl Phys Demokritos, Aghia Paraskevi, Greece

[41] Univ Athens, Athens, Greece

[42] Univ Ioannina, GR-45110 Ioannina, Greece

[43] KFKI Res Inst Particle & Nucl Phys, Budapest, Hungary

[44] Inst Nucl Res ATOMKI, Debrecen, Hungary

[45] Univ Debrecen, H-4012 Debrecen, Hungary

[46] Panjab Univ, Chandigarh 160014, India

[47] Univ Delhi, Delhi 110007, India

[48] Saha Inst Nucl Phys, Kolkata, India

[49] Bhabha Atom Res Ctr, Bombay 400085, Maharashtra, India

[50] Tata Inst Fundamental Res EHEP, Bombay, Maharashtra, India

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2012年 / 08期

基金：

巴西圣保罗研究基金会; 芬兰科学院; 欧洲研究理事会; 美国国家科学基金会;

关键词：

Hadron-Hadron Scattering; CHARGED-PARTICLES; GLUINO PRODUCTION; SQUARK; DECAYS;

D O I：

10.1007/JHEP08(2012)026

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 has been performed for long-lived particles that have stopped in the CMS detector, during 7TeV proton-proton operations of the CERN LHC. The existence of such particles could be inferred from observation of their decays when there were no proton-proton collisions in the CMS detector, namely during gaps between LHC beam crossings. Using a data set in which CMS recorded an integrated luminosity of 4.0 fb(-1), and a search interval corresponding to 246 hours of trigger live time, 12 events are observed, with a mean background prediction of 8.6 +/- 2.4 events. Limits are presented at 95% confidence level on long-lived gluino and stop production, over 13 orders of magnitude of particle lifetime. Assuming the "cloud model" of R-hadron interactions, a gluino with mass below 640 GeV and a stop with mass below 340 GeV are excluded, for lifetimes between 10 mu s and 1000s.

引用

页数：32

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Janssen, X.
Knutsson, A.
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Ghete, V. M.
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Hoermann, N.
Hrubec, J.
Jeitler, M.
Kiesenhofer, W.
Knuenz, V.
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Kraetschmer, I.
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Mikulec, I.
Pernicka, M.
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Janssen, X.
Luyckx, S.
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JOURNAL OF HIGH ENERGY PHYSICS, 2012, (11):
[9] Search for long-lived, multi-charged particles in pp collisions at √s=7 TeV using the ATLAS detector
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Adragna, P.
Adye, T.
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Ahsan, M.
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Akimoto, G.
Akimov, A. V.
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Albert, J.
Albrand, S.
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Aleksandrov, I. N.
Alessandria, F.
Alexa, C.
Alexander, G.
Alexandre, G.
Alexopoulos, T.
Alhroob, M.
Aliev, M.
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Alison, J.
Allbrooke, B. M. M.
Allport, P. P.
Allwood-Spiers, S. E.
PHYSICS LETTERS B, 2013, 722 (4-5) : 305 - 323
[10] Search for Stopped Gluinos in pp Collisions at √s=7 TeV
Khachatryan, V.
Sirunyan, A. M.
Tumasyan, A.
Adam, W.
Bergauer, T.
Dragicevic, M.
Eroe, J.
Fabjan, C.
Friedl, M.
Fruehwirth, R.
Ghete, V. M.
Hammer, J.
Haensel, S.
Hartl, C.
Hoch, M.
Hoermann, N.
Hrubec, J.
Jeitler, M.
Kasieczka, G.
Kiesenhofer, W.
Krammer, M.
Liko, D.
Mikulec, I.
Pernicka, M.
Rohringer, H.
Schoefbeck, R.
Strauss, J.
Taurok, A.
Teischinger, F.
Waltenberger, W.
Walzel, G.
Widl, E.
Wulz, C. -E.
Mossolov, V.
Shumeiko, N.
Gonzalez, J. Suarez
Benucci, L.
Ceard, L.
Cerny, K.
De Wolf, E. A.
Janssen, X.
Maes, T.
Mucibello, L.
Ochesanu, S.
Roland, B.
Rougny, R.
Selvaggi, M.
Van Haevermaet, H.
Van Mechelen, P.
Van Remortel, N.
PHYSICAL REVIEW LETTERS, 2011, 106 (01)

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