Observation of the diphoton decay of the Higgs boson and measurement of its properties

Please use this identifier to cite or link to this item: https://ir.lib.ncu.edu.tw/handle/987654321/105538

Title:	Observation of the diphoton decay of the Higgs boson and measurement of its properties
Authors:	林宗泰;Levine, Aaron;Poehlsen, Jennifer;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;Rose, Anthony;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;Ahmad, Ashfaq;Mohanty, Ajit Kumar;Spiropulu, Maria;De Moraes Gregores, Eduardo;Malcles, Julie;Dewanjee, Ram Krishna;Tamponi, Umberto;Jain, Shilpi;Luyckx, Sten;Danielson, Thomas;Fabbri, Fabrizio;Berry, Edmund;Chwalek, Thorsten;Dupont-Sagorin, Niels;Paktinat Mehdiabadi, Saeid;Szillasi, Zoltan;Bauer, Gerry;Woods, Nathaniel;Hatakeyama, Kenichi;Kazana, Malgorzata;Dumanoglu, Isa;Frueboes, Tomasz;Bachtis, Michail;Costa, Salvatore;Gerosa, Raffaele;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
Contributors:	理學院物理學系
Keywords:	Astronomy;Astrophysics and Cosmology;Collisions (Nuclear physics);Elementary Particles;Experiment;Hadrons;Heavy Ions;hep;High Energy Physics - Experiment;Measurement;Measurement Science and Instrumentation;Nuclear Energy;Nuclear Physics;Particle Physics;Physics;Physics and Astronomy;Quantum Field Theories;Quantum Field Theory;Regular - Experimental Physics;Regular Article - Experimental Physics;String Theory
Date:	2014-10-21
Issue Date:	2026-04-23 12:34:54 (UTC+8)
Publisher:	Springer New York;Berlin/Heidelberg: Springer Science and Business Media LLC
Abstract:	摘要： Observation of the diphoton decay mode of the recently discovered Higgs boson and measurement of some of its properties are reported. The analysis uses the entire dataset collected by the CMS experiment in proton-proton collisions during the 2011 and 2012 LHC running periods. The data samples correspond to integrated luminosities of 5.1 fb$^{-1}$ at $\sqrt{s}$ = 7 TeV and 19.7 fb$^{-1}$ at 8 TeV. A clear signal is observed in the diphoton channel at a mass close to 125 GeV with a local significance of 5.7 $\sigma$, where a significance of 5.2 $\sigma$ is expected for the standard model Higgs boson. The mass is measured to be 124.70 $\pm$ 0.34 GeV = 124.70 $\pm$ 0.31 (stat) $\pm$ 0.15 (syst) GeV, and the best-fit signal strength relative to the standard model prediction is 1.14$^{+0.26}_{-0.23}$ =1.14 $\pm$ 0.21 (stat) $^{+0.09}_{-0.05}$ (syst) $^{+0.13}_{-0.09}$ (theo). Additional measurements include the signal strength modifiers associated with different production mechanisms, and hypothesis tests between spin-0 and spin-2 models. Observation of the diphoton decay mode of the recently discovered Higgs boson and measurement of some of its properties are reported. The analysis uses the entire dataset collected by the CMS experiment in proton-proton collisions during the 2011 and 2012 LHC running periods. The data samples correspond to integrated luminosities of 5.1 $\,\text {fb}^\text {-1}$ at $\sqrt{s}=7\,\text {TeV}\,$ and 19.7 $\,\text {fb}^\text {-1}$ at 8 $\,\text {TeV}$ . A clear signal is observed in the diphoton channel at a mass close to 125 $\,\text {GeV}$ with a local significance of $5.7\,\sigma $ , where a significance of $5.2\,\sigma $ is expected for the standard model Higgs boson. The mass is measured to be $124.70\pm 0.34\,\text {GeV} \,=124.70\pm 0.31\,\text {(stat)}\,\pm 0.15\,\text {(syst)}\,\,\text {GeV} \,$ , and the best-fit signal strength relative to the standard model prediction is $1.14^\mathrm{+0.26}_{-0.23}=1.14\pm 0.21\,\text {(stat)}\,^\mathrm{+0.09}_{-0.05}\,\text {(syst)}\,^\mathrm{+0.13}_{-0.09}\,\text {(theo)}\,$ . Additional measurements include the signal strength modifiers associated with different production mechanisms, and hypothesis tests between spin-0 and spin-2 models. Observation of the diphoton decay mode of the recently discovered Higgs boson and measurement of some of its properties are reported. The analysis uses the entire dataset collected by the CMS experiment in proton-proton collisions during the 2011 and 2012 LHC running periods. The data samples correspond to integrated luminosities of 5.1 inverse femtobarns at sqrt(s) = 7 TeV and 19.7 inverse femtobarns at 8 TeV. A clear signal is observed in the diphoton channel at a mass close to 125 GeV with a local significance of 5.7 sigma, where a significance of 5.2 sigma is expected for the standard model Higgs boson. The mass is measured to be 124.70 +/- 0.34 GeV = 124.70 +/- 0.31 (stat) +/- 0.15 (syst) GeV, and the best-fit signal strength relative to the standard model prediction is 1.14 +0.26/-0.23 = 1.14 +/- 0.21 (stat) +0.09/-0.05 (syst) +0.13/-0.09 (theo). Additional measurements include the signal strength modifiers associated with different production mechanisms, and hypothesis tests between spin-0 and spin-2 models. 其他題名： Eur. Phys. J. C 其他題名： Eur Phys J C Part Fields 出版者： Berlin/Heidelberg: Springer Science and Business Media LLC 出版日期： 2014-10 出處： The European Physical Journal C, 2014-10, Vol.74 (10), p.3076-, Article 3076 資源來源： Publicly available content database 版權： The Author(s) 2014 版權： COPYRIGHT 2014 Springer 版權： CC0 1.0 - Universal 識別號： ISSN: 1434-6044 識別號： ISSN: 1434-6052 識別號： EISSN: 1434-6052 識別號： DOI: 10.1140/epjc/s10052-014-3076-z 識別號： PMID: 25814871
Appears in Collections:	[Department of Physics] journal & Dissertation

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