Search for the Standard Model Higgs boson produced in association with top quarks and decaying into in collisions at with the ATLAS detector

被引：120

作者：

Aad, G. ^{[120
,121
]}

Abbott, B. ^{[152
]}

Abdallah, J. ^{[211
]}

Abdinov, O. ^{[14
]}

Aben, R. ^{[146
]}

Abolins, M. ^{[126
]}

AbouZeid, O. S. ^{[219
]}

Abramowicz, H. ^{[213
]}

Abreu, H. ^{[212
]}

Abreu, R. ^{[43
]}

Abulaiti, Y. ^{[204
,205
]}

Acharya, B. S. ^{[226
,227
,247
]}

Adamczyk, L. ^{[60
]}

Adams, D. L. ^{[37
]}

Adelman, J. ^{[147
]}

Adomeit, S. ^{[137
]}

Adye, T. ^{[177
]}

Affolder, A. A. ^{[106
]}

Agatonovic-Jovin, T. ^{[17
]}

Aguilar-Saavedra, J. A. ^{[168
]}

Agustoni, M. ^{[22
,23
]}

Ahlen, S. P. ^{[31
]}

Ahmadov, F. ^{[14
,95
]}

Aielli, G. ^{[181
,182
]}

Akerstedt, H. ^{[204
,205
]}

Akesson, T. P. A. ^{[116
]}

Akimoto, G. ^{[215
,216
]}

Akimov, A. V. ^{[133
]}

Alberghi, G. L. ^{[28
,29
]}

Albert, J. ^{[237
]}

Albrand, S. ^{[81
]}

Alconada Verzini, M. J. ^{[101
,102
]}

Aleksa, M. ^{[43
]}

Aleksandrov, I. N. ^{[95
]}

Alexa, C. ^{[38
]}

Alexander, G. ^{[213
]}

Alexopoulos, T. ^{[13
]}

Alhroob, M. ^{[152
]}

Alimonti, G. ^{[127
]}

Alio, L. ^{[120
,121
]}

Alison, J. ^{[44
]}

Alkire, S. P. ^{[56
]}

Allbrooke, B. M. M. ^{[24
]}

Allport, P. P. ^{[106
]}

Aloisio, A. ^{[22
,142
,143
]}

Alonso, A. ^{[57
]}

Alonso, F. ^{[101
,102
]}

Alpigiani, C. ^{[109
]}

Altheimer, A. ^{[56
]}

Gonzalez, B. Alvarez ^{[126
]}

机构：

[1] Univ Adelaide, Dept Phys, Adelaide, SA, Australia

[2] SUNY Albany, Dept Phys, Albany, NY USA

[3] Univ Alberta, Dept Phys, Edmonton, AB, Canada

[4] Ankara Univ, Dept Phys, TR-06100 Ankara, Turkey

[5] Istanbul Aydin Univ, Istanbul, Turkey

[6] TOBB Univ Econ & Technol, Div Phys, Ankara, Turkey

[7] CNRS, IN2P3, LAPP, Annecy Le Vieux, France

[8] Univ Savoie Mt Blanc, Annecy Le Vieux, France

[9] Argonne Natl Lab, Div High Energy Phys, Argonne, IL 60439 USA

[10] Univ Arizona, Dept Phys, Tucson, AZ 85721 USA

[11] Univ Texas Arlington, Dept Phys, Arlington, TX 76019 USA

[12] Univ Athens, Dept Phys, Athens, Greece

[13] Natl Tech Univ Athens, Dept Phys, Zografos, Greece

[14] Azerbaijan Acad Sci, Inst Phys, Baku 370143, Azerbaijan

[15] Univ Autonoma Barcelona, Inst Fis Altes Energies, E-08193 Barcelona, Spain

[16] Univ Autonoma Barcelona, Dept Fis, E-08193 Barcelona, Spain

[17] Univ Belgrade, Inst Phys, Belgrade, Serbia

[18] Univ Bergen, Dept Phys & Technol, Bergen, Norway

[19] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Phys, Berkeley, CA 94720 USA

[20] Univ Calif Berkeley, Berkeley, CA 94720 USA

[21] Humboldt Univ, Dept Phys, Berlin, Germany

[22] Univ Bern, Albert Einstein Ctr Fundamental Phys, Bern, Switzerland

[23] Univ Bern, High Energy Phys Lab, Bern, Switzerland

[24] Univ Birmingham, Sch Phys & Astron, Birmingham, W Midlands, England

[25] Bogazici Univ, Dept Phys, Istanbul, Turkey

[26] Dogus Univ, Dept Phys, Istanbul, Turkey

[27] Gaziantep Univ, Dept Engn Phys, Gaziantep, Turkey

[28] Ist Nazl Fis Nucl, Sez Bologna, I-40126 Bologna, Italy

[29] Univ Bologna, Dipartimento Fis & Astron, Bologna, Italy

[30] Univ Bonn, Inst Phys, Bonn, Germany

[31] Boston Univ, Dept Phys, Boston, MA 02215 USA

[32] Brandeis Univ, Dept Phys, Waltham, MA 02254 USA

[33] Univ Fed Rio de Janeiro, COPPE, EE, IF, Rio De Janeiro, Brazil

[34] Fed Univ Juiz de Fora UFJF, Elect Circuits Dept, Juiz De Fora, Brazil

[35] Fed Univ Sao Joao del Rei UFSJ, Sao Joao Del Rei, Brazil

[36] Univ Sao Paulo, Inst Fis, BR-01498 Sao Paulo, Brazil

[37] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA

[38] Natl Inst Phys & Nucl Engn, Bucharest, Romania

[39] Natl Inst Res & Dev Isotop & Mol Technol, Dept Phys, Cluj Napoca, Romania

[40] Univ Buenos Aires, Dept Fis, Buenos Aires, DF, Argentina

[41] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England

[42] Carleton Univ, Dept Phys, Ottawa, ON K1S 5B6, Canada

[43] CERN, CH-1211 Geneva 23, Switzerland

[44] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA

[45] Pontificia Univ Catolica Chile, Dept Fis, Santiago, Chile

[46] Univ Tecn Federico Santa Maria, Dept Fis, Valparaiso, Chile

[47] Chinese Acad Sci, Inst High Energy Phys, Beijing, Peoples R China

[48] Univ Sci & Technol China, Dept Modern Phys, Hefei, Anhui, Peoples R China

[49] Nanjing Univ, Dept Phys, Nanjing, Jiangsu, Peoples R China

[50] Shandong Univ, Sch Phys, Jinan 250100, Shandong, Peoples R China

来源：

EUROPEAN PHYSICAL JOURNAL C | 2015年 / 75卷 / 07期

基金：

美国国家科学基金会; 加拿大自然科学与工程研究理事会; 巴西圣保罗研究基金会;

关键词：

PARTON DISTRIBUTIONS; BROKEN SYMMETRIES; PAIR PRODUCTION; CROSS-SECTION; MONTE-CARLO; PLUS PLUS; PROGRAM; MASS; NLO;

D O I：

10.1140/epjc/s10052-015-3543-1

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 the Standard Model Higgs boson produced in association with a top-quark pair, , is presented. The analysis uses 20.3 fb(-1) of pp collision data at , collected with the ATLAS detector at the Large Hadron Collider during 2012. The search is designed for the decay mode and uses events containing one or two electrons or muons. In order to improve the sensitivity of the search, events are categorised according to their jet and b-tagged jet multiplicities. A neural network is used to discriminate between signal and background events, the latter being dominated by +jets production. In the single-lepton channel, variables calculated using a matrix element method are included as inputs to the neural network to improve discrimination of the irreducible background. No significant excess of events above the background expectation is found and an observed (expected) limit of 3.4 (2.2) times the Standard Model cross section is obtained at 95 % confidence level. The ratio of the measured signal cross section to the Standard Model expectation is found to be assuming a Higgs boson mass of 125 Gev.

引用

页码：1 / 50

页数：50

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