Search for the decays of stopped exotic long-lived particles produced in P-P collisions at 13 TeV at CMS

Search for the decays of stopped exotic long-lived particles produced in P-P collisions at 13 TeV at CMS

Bibliographic Details
Main Author: Ji, Weifeng
Language:English
Published: The Ohio State University / OhioLINK 2018
Subjects:
Physics
Large Hadron Collider
stopped particles
long-lived particles
Compact Muon Solenoid
Online Access:http://rave.ohiolink.edu/etdc/view?acc_num=osu1524216345344165
id ndltd-OhioLink-oai-etd.ohiolink.edu-osu1524216345344165
record_format oai_dc
spelling ndltd-OhioLink-oai-etd.ohiolink.edu-osu15242163453441652021-08-03T07:06:26Z Search for the decays of stopped exotic long-lived particles produced in P-P collisions at 13 TeV at CMS Ji, Weifeng Physics Large Hadron Collider stopped particles long-lived particles Compact Muon Solenoid In this dissertation, I present the searches looking for decays of stopped massive long-lived exotic particles, which are pair produced in the proton-proton collisions at 13 TeV and come to rest afterwards in the CMS detector at the CERN LHC. The decays are most likely to be observed when there are no collisions. Two specific decay scenarios are studied: a long-lived particle (LLP) decaying hadronically or semi- leptonically in the calorimeter, and a LLP decaying semi-leptonically or leptonically to a pair of muons in the muon detector. The calorimeter-based search is performed using 2.7 fb-1 of 13 TeV collision run data collected in 2015 and 35.9 fb-1 of 13 TeV collision run data collected in 2016, corresponding to a total trigger livetime of 721 hours. The muon search is performed using 2.8 fb-1 of 13 TeV collision run data collected in 2015 and 36.2 fb-1 of 13 TeV collision run data collected in 2016, corresponding to a total trigger livetime of 744 hours. Search results are interpreted in a couple of simplified models. The limits on the production cross sections and masses of LLPs are calculated as a function of particle lifetimes, which vary from 100 ns to 10 days, assuming the corresponding decaying branching fractions to be 100%. The results are the most stringent ones on the stopped LLPs so far. 2018-09-18 English text The Ohio State University / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=osu1524216345344165 http://rave.ohiolink.edu/etdc/view?acc_num=osu1524216345344165 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws.
collection NDLTD
language English
sources NDLTD
topic Physics
Large Hadron Collider
stopped particles
long-lived particles
Compact Muon Solenoid
spellingShingle Physics
Large Hadron Collider
stopped particles
long-lived particles
Compact Muon Solenoid
Ji, Weifeng
Search for the decays of stopped exotic long-lived particles produced in P-P collisions at 13 TeV at CMS
author Ji, Weifeng
author_facet Ji, Weifeng
author_sort Ji, Weifeng
title Search for the decays of stopped exotic long-lived particles produced in P-P collisions at 13 TeV at CMS
title_short Search for the decays of stopped exotic long-lived particles produced in P-P collisions at 13 TeV at CMS
title_full Search for the decays of stopped exotic long-lived particles produced in P-P collisions at 13 TeV at CMS
title_fullStr Search for the decays of stopped exotic long-lived particles produced in P-P collisions at 13 TeV at CMS
title_full_unstemmed Search for the decays of stopped exotic long-lived particles produced in P-P collisions at 13 TeV at CMS
title_sort search for the decays of stopped exotic long-lived particles produced in p-p collisions at 13 tev at cms
publisher The Ohio State University / OhioLINK
publishDate 2018
url http://rave.ohiolink.edu/etdc/view?acc_num=osu1524216345344165
work_keys_str_mv AT jiweifeng searchforthedecaysofstoppedexoticlonglivedparticlesproducedinppcollisionsat13tevatcms
_version_ 1719453762750251008

Similar Items