266 134

Search for resonant t(t)over-bar production in proton-proton collisions at root s=8 TeV

Title
Search for resonant t(t)over-bar production in proton-proton collisions at root s=8 TeV
Author
김태정
Keywords
STANDARD MODEL; CROSS-SECTIONS; TOP PRODUCTION; PP COLLISIONS; W BOSON; TOPCOLOR; JETS; LHC; HIERARCHY; PHYSICS
Issue Date
2016-01
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW D, v. 93, NO 1, Article number 012001, Page. 1-1
Abstract
A search is performed for the production of heavy resonances decaying into top-antitop quark pairs in proton-proton collisions at root s = 8 TeV. Data used for the analyses were collected with the CMS detector and correspond to an integrated luminosity of 19.7 fb(-1). The search is performed using events with three different final states, defined by the number of leptons (electrons and muons) from the t (t) over bar. WbWb decay. The analyses are optimized for reconstruction of top quarks with high Lorentz boosts, where jet substructure techniques are used to enhance the sensitivity. Results are presented for all channels and a combination is performed. No significant excess of events relative to the expected yield from standard model processes is observed. Upper limits on the production cross section of heavy resonances decaying to t (t) over bar are calculated. A narrow leptophobic topcolor Z' resonance with a mass below 2.4 TeV is excluded at 95% confidence level. Limits are also derived for a broad Z' resonance with a 10% width relative to the resonance mass, and a Kaluza-Klein excitation of the gluon in the Randall-Sundrum model. These are the most stringent limits to date on heavy resonances decaying into top-antitop quark pairs.
URI
https://journals.aps.org/prd/abstract/10.1103/PhysRevD.93.012001http://hdl.handle.net/20.500.11754/30593
ISSN
1550-7998; 1550-2368
DOI
10.1103/PhysRevD.93.012001
Appears in Collections:
COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > PHYSICS(물리학과) > Articles
Files in This Item:
Search for resonant t(t)over-bar production in proton-proton collisions at root s=8 TeV.pdfDownload
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE