Search for R-parity violating decays of a top squark in proton-proton collisions at root s=8TeV

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F16%3A10333788" target="_blank" >RIV/00216208:11320/16:10333788 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.physletb.2016.06.039" target="_blank" >http://dx.doi.org/10.1016/j.physletb.2016.06.039</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.physletb.2016.06.039" target="_blank" >10.1016/j.physletb.2016.06.039</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Search for R-parity violating decays of a top squark in proton-proton collisions at root s=8TeV

Popis výsledku v původním jazyce

The results of a search for a supersymmetric partner of the top quark (top squark), pair-produced in proton-proton collisions at root s = 8 TeV, are presented. The search, which focuses on R-parity violating, chargino-mediated decays of the top squark, is performed in final states with low missing transverse momentum, two oppositely charged electrons or muons, and at least five jets. The analysis uses a data sample corresponding to an integrated luminosity of 19.7 fb(-1)collected with the CMS detector at the LHC in 2012. The data are found to be in agreement with the standard model expectation, and upper limits are placed on the top squark pair production cross section at 95% confidence level. Assuming a 100% branching fraction for the top squark decay chain, (t) over tilde -> t (chi) over tilde (+/-)(1), (chi) over tilde (+/-)(1) -> l(+/-) + jj, top squark masses less than 890(1000) GeV for the electron (muon) channel are excluded for the first time in models with a single nonzero R-parity violating coupling. lambda'(ijk) (i, j, k <= 2), where i, j, k correspond to the three generations. (C) 2016 The Author(s). Published by Elsevier B.V.

Název v anglickém jazyce

Search for R-parity violating decays of a top squark in proton-proton collisions at root s=8TeV

Popis výsledku anglicky

The results of a search for a supersymmetric partner of the top quark (top squark), pair-produced in proton-proton collisions at root s = 8 TeV, are presented. The search, which focuses on R-parity violating, chargino-mediated decays of the top squark, is performed in final states with low missing transverse momentum, two oppositely charged electrons or muons, and at least five jets. The analysis uses a data sample corresponding to an integrated luminosity of 19.7 fb(-1)collected with the CMS detector at the LHC in 2012. The data are found to be in agreement with the standard model expectation, and upper limits are placed on the top squark pair production cross section at 95% confidence level. Assuming a 100% branching fraction for the top squark decay chain, (t) over tilde -> t (chi) over tilde (+/-)(1), (chi) over tilde (+/-)(1) -> l(+/-) + jj, top squark masses less than 890(1000) GeV for the electron (muon) channel are excluded for the first time in models with a single nonzero R-parity violating coupling. lambda'(ijk) (i, j, k <= 2), where i, j, k correspond to the three generations. (C) 2016 The Author(s). Published by Elsevier B.V.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BF - Elementární částice a fyzika vysokých energií

OECD FORD obor

—

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

ISSN

0370-2693

e-ISSN

—

Svazek periodika

760

Číslo periodika v rámci svazku

2016

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

24

Strana od-do

178-201

Kód UT WoS článku

000382890500029

EID výsledku v databázi Scopus

2-s2.0-84977269601