Limits on the Higgs boson lifetime and width from its decay to four charged leptons

Please use this identifier to cite or link to this item: https://ir.lib.ncu.edu.tw/handle/987654321/105145

Title:	Limits on the Higgs boson lifetime and width from its decay to four charged leptons
Authors:	林宗泰;Levine, Aaron;Poehlsen, Jennifer;Apresyan, Artur;Bagliesi, Giuseppe;Velkovska, Julia;Varelas, Nikos;Wöhrmann, Clemens;Seva, Tomislav;Innocente, Vincenzo;Swain, Sanjay Kumar;Hadjiiska, Roumyana;Gascon, Susan;Geiser, Achim;Spalding, William J;Shukla, Prashant;Roscher, Frank;Colaleo, Anna;Piotrzkowski, Krzysztof;Steinbrück, Georg;Avetisyan, Aram;Rose, Anthony;Li, Qiang;Elliott-Peisert, Anna;Farrell, Chris;Mittal, Monika;Junkes, Alexandra;Pekkanen, Juska;Pant, Lalit Mohan;Tricomi, Alessia;Martinez, German;Cockerill, David JA;Ferencek, Dinko;Marchesini, Ivan;Haas, Jeff;Tosi, Nicolò;Ekmedzic, Marko;Lu, Ying;Alyari, Maral;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;Fabbri, Fabrizio;Berry, Edmund;Chwalek, Thorsten;Paktinat Mehdiabadi, Saeid;Nowatschin, Dominik;Korol, Ievgen;Szillasi, Zoltan;Woods, Nathaniel;Hatakeyama, Kenichi;Kazana, Malgorzata;Frueboes, Tomasz;Brandt, Stephanie;Bachtis, Michail;Costa, Salvatore;Gerosa, Raffaele;Letts, James;Kim, Tae Jeong;Saka, Halil;Skatchkov, Nikolai;Piparo, Danilo;Beck, Lana;Van Mechelen, Pierre;Castaneda Hernandez, Alfredo;Fulcher, Jonathan;West, Christopher;Gomez, Gervasio;Gninenko, Sergei;Dinardo, Mauro Emanuele;Ptochos, Fotios;Ford, William T;Kovalskyi, Dmytro;Damgov, Jordan;Chao, Yuan;Beri, Suman Bala;Cankocak, Kerem;Lesko, Zachary;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;Vavilov, Sergey
Contributors:	理學院物理學系
Keywords:	Confidence intervals;Couplings;Detectors;Experiment;Gravitation;Higgs bosons;High Energy Physics - Experiment;Large Hadron Collider;Luminosity;Particle Physics;Physics;Solenoids
Date:	2015-10-22
Issue Date:	2026-04-23 12:08:17 (UTC+8)
Publisher:	United States: American Physical Society (APS)
Abstract:	摘要： Constraints on the lifetime and width of the Higgs boson are obtained from $\mathrm{H} \to \mathrm{ZZ} \to 4\ell$ events using data recorded by the CMS experiment during the LHC run 1 with an integrated luminosity of 5.1 and 19.7 fb$^{-1}$ at a center-of-mass energy of 7 and 8 TeV, respectively. The measurement of the Higgs boson lifetime is derived from its flight distance in the CMS detector with an upper bound of $\tau_{\mathrm{H}} $ lower than $ 1.9 \times 10^{-13}$ s at the 95% confidence level (CL), corresponding to a lower bound on the width of $\Gamma_{\mathrm{H}} $ larger than $ 3.5 \times 10^{-9} $ MeV. The measurement of the width is obtained from an off-shell production technique, generalized to include anomalous couplings of the Higgs boson to two electroweak bosons. From this measurement, a joint constraint is set on the Higgs boson width and a parameter $f_{\Lambda Q}$ that expresses an anomalous coupling contribution as an on-shell cross-section fraction. The limit on the Higgs boson width is $\Gamma_{\mathrm{H}} $ lower than 46 MeV with $f_{\Lambda Q}$ unconstrained and $\Gamma_{\mathrm{H}} $ lower than 26 MeV for $f_{\Lambda Q}=0$ at the 95% CL. The constraint $f_{\Lambda Q} $ lower than $ 3.8 \times 10^{-3}$ at the 95% CL is obtained for the expected standard model Higgs boson width. Constraints on the lifetime and width of the Higgs boson are obtained from H→ZZ→4ℓ events using data recorded by the CMS experiment during the LHC run 1 with an integrated luminosity of 5.1 and 19.7 fb-1 at a center-of-mass energy of 7 and 8 TeV, respectively. The measurement of the Higgs boson lifetime is derived from its flight distance in the CMS detector with an upper bound of τH<1.9×10-13 s at the 95% confidence level (C.L.), corresponding to a lower bound on the width of ΓH>3.5×10-9 MeV. The measurement of the width is obtained from an off-shell production technique, generalized to include anomalous couplings of the Higgs boson to two electroweak bosons. From this measurement, a joint constraint is set on the Higgs boson width and a parameter fΛQ that expresses an anomalous coupling contribution as an on-shell cross-section fraction. The limit on the Higgs boson width is ΓH<46 MeV with fΛQ unconstrained and ΓH<26 MeV for fΛQ=0 at the 95% C.L. The constraint fΛQ<3.8×10-3 at the 95% C.L. is obtained for the expected standard model Higgs boson width. Constraints on the lifetime and width of the Higgs boson are obtained from H to ZZ to 4 lepton events using data recorded by the CMS experiment during the LHC run 1 with an integrated luminosity of 5.1 and 19.7 inverse femtobarns at a center-of-mass energy of 7 and 8 TeV, respectively. The measurement of the Higgs boson lifetime is derived from its flight distance in the CMS detector with an upper bound of tau[H] < 1.9E-13 s at the 95% confidence level (CL), corresponding to a lower bound on the width of Gamma[H] > 3.5E-9 MeV. The measurement of the width is obtained from an off-shell production technique, generalized to include anomalous couplings of the Higgs boson to two electroweak bosons. From this measurement, a joint constraint is set on the Higgs boson width and a parameter f[LQ] that expresses an anomalous coupling contribution as an on-shell cross-section fraction. The limit on the Higgs boson width is Gamma[H] < 46 MeV with f[LQ] unconstrained and Gamma[H] < 26 MeV for f[LQ] = 0 at the 95% CL. The constraint f[LQ] < 3.8E-3 at the 95% CL is obtained for the expected standard model Higgs boson width. 出版者： United States: American Physical Society (APS) 出版日期： 2015-10-22 出處： Physical Review D, 2015-10, Vol.92 (7), Article 072010 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.92.072010
Appears in Collections:	[Department of Physics] journal & Dissertation

Files in This Item:

File	Description	Size	Format
index.html		0Kb	HTML	18	View/Open

社群 sharing

Loading...