Search for direct pair production of supersymmetric top quarks decaying to all-hadronic final states in pp collisions at √s=8 TeV

被引：0

作者：

Khachatryan, V. ^{[1
]}

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

Tumasyan, A. ^{[1
]}

Adam, W. ^{[2
]}

Asilar, E. ^{[2
]}

Bergauer, T. ^{[2
]}

Brandstetter, J. ^{[2
]}

Brondolin, E. ^{[2
]}

Dragicevic, M. ^{[2
]}

Ero, J. ^{[2
]}

Flechl, M. ^{[2
]}

Friedl, M. ^{[2
]}

Fruhwirth, R. ^{[2
,169
]}

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

Hartl, C. ^{[2
]}

Hormann, N. ^{[2
]}

Hrubec, J. ^{[2
]}

Jeitler, M. ^{[2
,169
]}

Knunz, V. ^{[2
]}

Konig, A. ^{[2
]}

Krammer, M. ^{[2
,169
]}

Kratschmer, I. ^{[2
]}

Liko, D. ^{[2
]}

Matsushita, T. ^{[2
]}

Mikulec, I. ^{[2
]}

Rabady, D. ^{[2
]}

Rahbaran, B. ^{[2
]}

Rohringer, H. ^{[2
]}

Schieck, J. ^{[2
,169
]}

Schofbeck, R. ^{[2
]}

Strauss, J. ^{[2
]}

Treberer-Treberspurg, W. ^{[2
]}

Waltenberger, W. ^{[2
]}

Wulz, C. -E. ^{[2
,169
]}

Mossolov, V. ^{[3
]}

Shumeiko, N. ^{[3
]}

Suarez Gonzalez, J. ^{[3
]}

Alderweireldt, S. ^{[4
]}

Cornelis, T. ^{[4
]}

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

Janssen, X. ^{[4
]}

Knutsson, A. ^{[4
]}

Lauwers, J. ^{[4
]}

Luyckx, S. ^{[4
]}

Klundert, M. Van De ^{[4
]}

Haevermaet, H. Van ^{[4
]}

Mechelen, P. Van ^{[4
]}

Remortel, N. Van ^{[4
]}

Spilbeeck, A. Van ^{[4
]}

Abu Zeid, S. ^{[5
]}

机构：

[1] Yerevan Phys Inst, Yerevan, 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, Ghent, Belgium

[8] Catholic Univ Louvain, Louvain La Neuve, Belgium

[9] Univ Mons, 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, Univ Fed ABC, Sao Paulo, Brazil

[13] Inst Nucl Energy Res, Sofia, Bulgaria

[14] Univ Sofia, Sofia, Bulgaria

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

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

[17] Univ Los Andes, Bogota, Colombia

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

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

[20] Inst Rudjer Boskov, 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, Gif Sur Yvette, France

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

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

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

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

[33] Georgian Tech Univ, Tbilisi, Georgia

[34] Tbilisi State Univ, Tbilisi, Georgia

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

[36] Rhein Westfal TH Aachen, Phys Inst 3, Aachen, Germany

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

[38] DESY, Hamburg, Germany

[39] Univ Hamburg, Hamburg, Germany

[40] Inst Expt Kernphys, Karlsruhe, Germany

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

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

[43] Univ Ioannina, Ioannina, Greece

[44] Wigner Res Ctr Phys, Budapest, Hungary

[45] Inst Nucl Res ATOMKI, Debrecen, Hungary

[46] Univ Debrecen, Debrecen, Hungary

[47] Natl Inst Sci Educ & Res, Bhubaneswar, Orissa, India

[48] Panjab Univ, Chandigarh, India

[49] Univ Delhi, Delhi, India

[50] Saha Inst Nucl Phys, Kolkata, India

来源：

EUROPEAN PHYSICAL JOURNAL C | 2016年 / 76卷 / 08期

基金：

美国国家科学基金会;

关键词：

NATURALNESS; BREAKING; PHYSICS; MODELS;

D O I：

10.1140/epjc/s10052-016-4292-5

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：

Results are reported from a search for the pair production of top squarks, the supersymmetric partners of top quarks, in final states with jets and missing transverse momentum. The data sample used in this search was collected by the CMS detector and corresponds to an integrated luminosity of 18.9 of proton-proton collisions at a centre-of-mass energy of 8 produced by the LHC. The search features novel background suppression and prediction methods, including a dedicated top quark pair reconstruction algorithm. The data are found to be in agreement with the predicted backgrounds. Exclusion limits are set in simplified supersymmetry models with the top squark decaying to jets and an undetected neutralino, either through a top quark or through a bottom quark and chargino. Models with the top squark decaying via a top quark are excluded for top squark masses up to 755 in the case of neutralino masses below 200. For decays via a chargino, top squark masses up to 620 are excluded, depending on the masses of the chargino and neutralino.

引用

页数：46

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