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    NCU Institutional Repository > 理學院 > 物理學系 > 期刊論文 >  Item 987654321/105307


    請使用永久網址來引用或連結此文件: https://ir.lib.ncu.edu.tw/handle/987654321/105307


    題名: Measurement of the properties of a Higgs boson in the four-lepton final state
    作者: 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;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;Eller, Philipp
    貢獻者: 理學院物理學系
    關鍵詞: Bosons;Channels;Confidence intervals;Experiment;Higgs bosons;High Energy Physics - Experiment;Hypotheses;Large Hadron Collider;Luminosity;Particle Physics;Physics;Texts
    日期: 2014-05-14
    上傳時間: 2026-04-23 12:15:46 (UTC+8)
    出版者: American Physical Society;American Physical Society (APS)
    摘要: 摘要： The properties of a Higgs boson candidate are measured in the $H \to ZZ \to 4l$ decay channel, with $l=e,\mu$, using data from pp collisions corresponding to an integrated luminosity of 5.1 inverse femtobarns at center-of-mass energy of $\sqrt{s}$=7 TeV and 19.7 inverse femtobarns at $\sqrt{s}$=8 TeV, recorded with the CMS detector at the LHC. The new boson is observed as a narrow resonance with a local significance of 6.8 standard deviations, a measured mass of 125.6$\pm$0.4 (stat.) $\pm$0.2 (syst.) GeV, and a total width less than 3.4 GeV at a 95% confidence level. The production cross section of the new boson times the branching fraction to four leptons is measured to be $0.93^{+0.26}_{-0.23} (stat.)^{+0.13}_{-0.09}$ (syst.) times that predicted by the standard model. Its spin-parity properties are found to be consistent with the expectations for the standard model Higgs boson. The hypotheses of a pseudoscalar and all tested spin-one boson hypotheses are excluded at a 99% confidence level or higher. All tested spin-two boson hypotheses are excluded at a 95% confidence level or higher. The properties of a Higgs boson candidate are measured in the <mml:math display=&quot;inline&quot;>H<mml:mo stretchy=&quot;false&quot;>→</mml:mo>ZZ<mml:mo stretchy=&quot;false&quot;>→</mml:mo>4ℓ</mml:math> decay channel, with <mml:math display=&quot;inline&quot;>ℓ=e</mml:math>, <mml:math display=&quot;inline&quot;>μ</mml:math>, using data from <mml:math display=&quot;inline&quot;>pp</mml:math> collisions corresponding to an integrated luminosity of <mml:math display=&quot;inline&quot;>5.1 fb−1</mml:math> at the center-of-mass energy of <mml:math display=&quot;inline&quot;>s=7 TeV</mml:math> and <mml:math display=&quot;inline&quot;>19.7 fb-1</mml:math> at <mml:math display=&quot;inline&quot;>s=8 TeV</mml:math>, recorded with the CMS detector at the LHC. The new boson is observed as a narrow resonance with a local significance of 6.8 standard deviations, a measured mass of <mml:math display=&quot;inline&quot;>125.6±0.4<mml:mo stretchy=&quot;false&quot;>(</mml:mo>stat<mml:mo stretchy=&quot;false&quot;>)</mml:mo>±0.2<mml:mo stretchy=&quot;false&quot;>(</mml:mo>syst<mml:mo stretchy=&quot;false&quot;>)</mml:mo> GeV</mml:math>, and a total width <mml:math display=&quot;inline&quot;>≤3.4 GeV</mml:math> at the 95% confidence level. The production cross section of the new boson times its branching fraction to four leptons is measured to be <mml:math display=&quot;inline&quot;>0.93-0.23+0.26<mml:mo stretchy=&quot;false&quot;>(</mml:mo>stat<mml:mo stretchy=&quot;false&quot;>)</mml:mo>-0.09+0.13<mml:mo stretchy=&quot;false&quot;>(</mml:mo>syst<mml:mo stretchy=&quot;false&quot;>)</mml:mo></mml:math> times that predicted by the standard model. Its spin-parity properties are found to be consistent with the expectations for the standard-model Higgs boson. The hypotheses of a pseudoscalar and all tested spin-1 boson hypotheses are excluded at the 99% confidence level or higher. All tested spin-2 boson hypotheses are excluded at the 95% confidence level or higher. The properties of a Higgs boson candidate are measured in the H to ZZ to 4l decay channel, with l = e, mu, using data from pp collisions corresponding to an integrated luminosity of 5.1 inverse femtobarns at the center-of-mass energy of sqrt(s) = 7 TeV and 19.7 inverse femtobarns at sqrt(s) = 8 TeV, recorded with the CMS detector at the LHC. The new boson is observed as a narrow resonance with a local significance of 6.8 standard deviations, a measured mass of 125.6 +- 0.4 (stat) +- 0.2 (syst) GeV, and a total width less than 3.4 GeV at the 95% confidence level. The production cross section of the new boson times its branching fraction to four leptons is measured to be 0.93 +0.26 -0.23 (stat) +0.13 -0.09 (syst) times that predicted by the standard model. Its spin-parity properties are found to be consistent with the expectations for the standard model Higgs boson. The hypotheses of a pseudoscalar and all tested spin-one boson hypotheses are excluded at the 99% confidence level or higher. All tested spin-two boson hypotheses are excluded at the 95% confidence level or higher.
    出版者： American Physical Society (APS)
    出版日期： 2014-05-14
    出處： Physical Review D, 2014-05, Vol.89 (9), Article 092007
    版權： CC0 1.0 - Universal
    識別號： ISSN: 1550-7998
    識別號： ISSN: 2470-0010
    識別號： ISSN: 1550-2368
    識別號： EISSN: 1550-2368
    識別號： EISSN: 2470-0029
    識別號： DOI: 10.1103/PhysRevD.89.092007
    顯示於類別:[物理學系] 期刊論文

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