Search for neutral color-octet weak-triplet scalar particles in proton-proton collisions at √s= 8TeV

Please use this identifier to cite or link to this item: https://ir.lib.ncu.edu.tw/handle/987654321/106553

Title:	Search for neutral color-octet weak-triplet scalar particles in proton-proton collisions at √s= 8TeV
Authors:	余欣珊;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;Vanini, Sara;Fulcher, Jonathan;West, Christopher;Gomez, Gervasio;Gninenko, Sergei;Dinardo, Mauro Emanuele;Kassel, Florian;Ptochos, Fotios;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
Contributors:	理學院物理學系
Keywords:	exotics;Experiment;Experiment-HEP;Hadron-Hadron Scattering;High Energy Physics - Experiment;Particle Physics;Physics;PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Date:	2015-09-01
Issue Date:	2026-04-23 13:28:38 (UTC+8)
Publisher:	United States: Springer
Abstract:	摘要： A search for pair production of neutral color-octet weak-triplet scalar particles ($\Theta^{0}$) is performed in processes where one $\Theta^{0}$ decays to a pair of b quark jets and the other to a Z boson plus a jet, with the Z boson decaying to a pair of electrons or muons. The search is performed with data collected by the CMS experiment at the CERN LHC corresponding to an integrated luminosity of 19.7 fb$^{-1}$ of proton-proton collisions at $\sqrt{s} =$ 8 TeV. The number of observed events is found to be in agreement with the standard model predictions. The 95% confidence level upper limit on the product of the cross section and branching fraction is obtained as a function of the $\Theta^{0}$ mass. The 95% confidence level lower bounds on the $\Theta^{0}$ mass are found to be 623 and 426 GeV, for two different octo-triplet theoretical scenarios. These are the first direct experimental bounds on particles predicted by the octo-triplet model. A search for pair production of neutral color-octet weak-triplet scalar particles (Θ$^{0}$) is performed in processes where one Θ$^{0}$ decays to a pair of b quark jets and the other to a Z boson plus a jet, with the Z boson decaying to a pair of electrons or muons. The search is performed with data collected by the CMS experiment at the CERN LHC corresponding to an integrated luminosity of 19.7 fb$^{−1}$ of proton-proton collisions at $ \sqrt{s}=8 $ TeV. The number of observed events is found to be in agreement with the standard model predictions. The 95% confidence level upper limit on the product of the cross section and branching fraction is obtained as a function of the Θ$^{0}$ mass. The 95% confidence level lower bounds on the Θ$^{0}$ mass are found to be 623 and 426 GeV, for two different octo-triplet theoretical scenarios. These are the first direct experimental bounds on particles predicted by the octo-triplet model. A search for pair production of neutral color-octet weak-triplet scalar particles (Theta) is performed in processes where one Theta decays to a pair of b quark jets and the other to a Z boson plus a jet, with the Z boson decaying to a pair of electrons or muons. The search is performed with data collected by the CMS experiment at the CERN LHC corresponding to an integrated luminosity of 19.7 inverse femtobarns of proton-proton collisions at sqrt(s) = 8 TeV. The number of observed events is found to be in agreement with the standard model predictions. The 95% confidence level upper limit on the product of the cross section and branching fraction is obtained as a function of the Theta mass. The 95% confidence level lower bounds on the Theta mass are found to be 623 and 426 GeV, for two different octo-triplet theoretical scenarios. These are the first direct experimental bounds on particles predicted by the octo-triplet model. 出版者： United States: Springer 出版日期： 2015-09-29 出處： JHEP, 2015-09, Vol.9 資源來源： ProQuest Publicly Available Content Database 版權： CC0 1.0 - Universal 識別號： ISSN: 1126-6708 識別號： EISSN: 1029-8479 識別號： DOI: 10.1007/JHEP09(2015)201
Appears in Collections:	[Department of Physics] journal & Dissertation

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