Measurement of Higgs boson production and properties in the WW decay channel with leptonic final states

Please use this identifier to cite or link to this item: https://ir.lib.ncu.edu.tw/handle/987654321/105194

Title:	Measurement of Higgs boson production and properties in the WW decay channel with leptonic final states
Authors:	余欣珊;Levine, Aaron;Apresyan, Artur;Bagliesi, Giuseppe;Velkovska, Julia;Varelas, Nikos;Seva, Tomislav;Innocente, Vincenzo;Swain, Sanjay Kumar;Hadjiiska, Roumyana;Gascon, Susan;Geiser, Achim;Spalding, William J;Shukla, Prashant;Colaleo, Anna;Piotrzkowski, Krzysztof;Steinbrück, Georg;Avetisyan, Aram;Li, Qiang;Elliott-Peisert, Anna;Farrell, Chris;Mittal, Monika;Pant, Lalit Mohan;Tricomi, Alessia;Martinez, German;Cockerill, David JA;Ferencek, Dinko;Marchesini, Ivan;Haas, Jeff;Christopher, Grant;Tosi, Nicolò;Ekmedzic, Marko;Lu, Ying;Brooke, James John;Mott, Alexander;Mohanty, Ajit Kumar;Spiropulu, Maria;De Moraes Gregores, Eduardo;Malcles, Julie;Tamponi, Umberto;Jain, Shilpi;Luyckx, Sten;Danielson, Thomas;Fabbri, Fabrizio;Berry, Edmund;Chwalek, Thorsten;Dupont-Sagorin, Niels;Paktinat Mehdiabadi, Saeid;Szillasi, Zoltan;Bauer, Gerry;Hatakeyama, Kenichi;Kazana, Malgorzata;Dumanoglu, Isa;Frueboes, Tomasz;Bachtis, Michail;Costa, Salvatore;Letts, James;Kim, Tae Jeong;Saka, Halil;Skatchkov, Nikolai;Piparo, Danilo;Van Mechelen, Pierre;Fulcher, Jonathan;West, Christopher;Gomez, Gervasio;Gninenko, Sergei;Dinardo, Mauro Emanuele;Ptochos, Fotios;Timciuc, Vladlen;Wilken, Rachel;Ford, William T;Kovalskyi, Dmytro;Damgov, Jordan;Chao, Yuan;Beri, Suman Bala;Cankocak, Kerem;Van Remortel, Nick;Rodozov, Mircho;Halkiadakis, Eva;Navarria, Francesco;Girgis, Semiray;Bellan, Riccardo;Kim, Gui Nyun;Sanders, Stephen;Chang, Sunghyun;Brochet, Sébastien;De La Cruz, Begona;Goldstein, Joel;Naumann-Emme, Sebastian;George, Christopher;Wolszczak, Weronika;Vavilov, Sergey;Dugad, Shashikant;Snow, Gregory R;Gilbert, Andrew;de Trocóniz, Jorge F;Kayis Topaksu, Aysel;Zhokin, Alexander;Mccartin, Joseph;Sigamani, Michael;Kreuzer, Peter
Contributors:	理學院物理學系
Keywords:	Bosons;Channels;Classical and Quantum Gravitation;Cross sections;Decay;Decomposition;Elementary Particles;Experiment;Hadron-Hadron Scattering;Higgs bosons;Higgs physics;High energy physics;High Energy Physics - Experiment;Particle Physics;Physics;Physics and Astronomy;Quantum Field Theories;Quantum Field Theory;Quantum Physics;Relativity Theory;Standard deviation;String Theory
Date:	2014-01-01
Issue Date:	2026-04-23 12:10:28 (UTC+8)
Publisher:	Springer Verlag;Berlin/Heidelberg: Springer Berlin Heidelberg
Abstract:	摘要： A search for the standard model Higgs boson decaying to a W-boson pair at the LHC is reported. The event sample corresponds to an integrated luminosity of 4.9 and 19.4 inverse femtobarns collected with the CMS detector in pp collisions at $\sqrt{s}$ = 7 and 8 TeV, respectively. The Higgs boson candidates are selected in events with two or three charged leptons. An excess of events above background is observed, consistent with the expectation from the standard model Higgs boson with a mass of around 125 GeV. The probability to observe an excess equal or larger than the one seen, under the background-only hypothesis, corresponds to a significance of 4.3 standard deviations for $m_H$ = 125.6 GeV. The observed signal cross section times the branching fraction to WW for $m_H$ = 125.6 GeV is 0.72$^{+0.20}_{-0.18}$ times the standard model expectation. The spin-parity $J_P=0^+$ hypothesis is favored against a narrow resonance with $J_P=2^+$ or $J_P=0^-$ that decays to a W-boson pair. This result provides strong evidence for a Higgs-like boson decaying to a W-boson pair. A search for the standard model Higgs boson decaying to a W-boson pair at the LHC is reported. The event sample corresponds to an integrated luminosity of 4.9 and 19.4 inverse femtobarns collected with the CMS detector in pp collisions at sqrt(s) = 7 and 8 TeV, respectively. The Higgs boson candidates are selected in events with two or three charged leptons. An excess of events above background is observed, consistent with the expectation from the standard model Higgs boson with a mass of around 125 GeV. The probability to observe an excess equal or larger than the one seen, under the background-only hypothesis, corresponds to a significance of 4.3 standard deviations for m[H] = 125.6 GeV. The observed signal cross section times the branching fraction to WW for m[H] = 125.6 GeV is 0.72+0.20-0.18 times the standard model expectation. The spin-parity J(P)=0(+) hypothesis is favored against a narrow resonance with J(P)=2(+) or J(P)=0(-) that decays to a W-boson pair. This result provides strong evidence for a Higgs-like boson decaying to a W-boson pair. 其他題名： J. High Energ. Phys 出版者： Berlin/Heidelberg: Springer Berlin Heidelberg 出版日期： 2014 出處： JHEP, 2014, Vol.2014 (1), p.1-86, Article 96 資源來源： ProQuest Publicly Available Content Database 版權： Cern for the benefit of the CMS collaboration 2014 版權： SISSA, Trieste, Italy 2014 版權： CC0 1.0 - Universal 識別號： ISSN: 1029-8479 識別號： ISSN: 1126-6708 識別號： ISSN: 1127-2236 識別號： EISSN: 1029-8479 識別號： DOI: 10.1007/JHEP01(2014)096
Appears in Collections:	[Department of Physics] journal & Dissertation

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