LHC searches for top-philic Kaluza-Klein graviton
Abstract We study the phenomenology of a massive graviton G with non-universal couplings to the Standard Model (SM) particles. Such a particle can arise as a warped Kaluza-Klein graviton from a framework of the Randall-Sundrum extra-dimension model. In particular, we consider a case in which G is to...
Main Authors: | , , |
---|---|
Format: | Article |
Language: | English |
Published: |
SpringerOpen
2018-10-01
|
Series: | Journal of High Energy Physics |
Subjects: | |
Online Access: | http://link.springer.com/article/10.1007/JHEP10(2018)046 |
id |
doaj-9d0c4b150d924292b2e7b4dccf06b28b |
---|---|
record_format |
Article |
spelling |
doaj-9d0c4b150d924292b2e7b4dccf06b28b2020-11-25T02:05:58ZengSpringerOpenJournal of High Energy Physics1029-84792018-10-0120181011710.1007/JHEP10(2018)046LHC searches for top-philic Kaluza-Klein gravitonChao-Qiang Geng0Da Huang1Kimiko Yamashita2Chongqing University of Posts & TelecommunicationsInstitute of Theoretical Physics, Faculty of Physics, University of WarsawPhysics Division, National Center for Theoretical SciencesAbstract We study the phenomenology of a massive graviton G with non-universal couplings to the Standard Model (SM) particles. Such a particle can arise as a warped Kaluza-Klein graviton from a framework of the Randall-Sundrum extra-dimension model. In particular, we consider a case in which G is top-philic, i.e., G interacts strongly with the right-handed top quark, resulting in the large top-loop contributions to its production via the gluon fusion and its decays to the SM gauge bosons. We take into account the constraints from the current 13 TeV LHC data on the channels of t t ¯ $$ t\overline{t} $$ , γγ, jj(gg), γZ, and ZZ. Consequently, it is found that the strongest limit for this spin-2 resonance G comes from the t t ¯ $$ t\overline{t} $$ pair search, which constrains the cutoff scale to be of O $$ \mathcal{O} $$ (100 GeV) for the right-top coupling of O $$ \mathcal{O} $$ (1) and the massive graviton mass in the range m G = 2–5 TeV, significantly relaxed compared with the universal G coupling case.http://link.springer.com/article/10.1007/JHEP10(2018)046Phenomenology of Field Theories in Higher Dimensions |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Chao-Qiang Geng Da Huang Kimiko Yamashita |
spellingShingle |
Chao-Qiang Geng Da Huang Kimiko Yamashita LHC searches for top-philic Kaluza-Klein graviton Journal of High Energy Physics Phenomenology of Field Theories in Higher Dimensions |
author_facet |
Chao-Qiang Geng Da Huang Kimiko Yamashita |
author_sort |
Chao-Qiang Geng |
title |
LHC searches for top-philic Kaluza-Klein graviton |
title_short |
LHC searches for top-philic Kaluza-Klein graviton |
title_full |
LHC searches for top-philic Kaluza-Klein graviton |
title_fullStr |
LHC searches for top-philic Kaluza-Klein graviton |
title_full_unstemmed |
LHC searches for top-philic Kaluza-Klein graviton |
title_sort |
lhc searches for top-philic kaluza-klein graviton |
publisher |
SpringerOpen |
series |
Journal of High Energy Physics |
issn |
1029-8479 |
publishDate |
2018-10-01 |
description |
Abstract We study the phenomenology of a massive graviton G with non-universal couplings to the Standard Model (SM) particles. Such a particle can arise as a warped Kaluza-Klein graviton from a framework of the Randall-Sundrum extra-dimension model. In particular, we consider a case in which G is top-philic, i.e., G interacts strongly with the right-handed top quark, resulting in the large top-loop contributions to its production via the gluon fusion and its decays to the SM gauge bosons. We take into account the constraints from the current 13 TeV LHC data on the channels of t t ¯ $$ t\overline{t} $$ , γγ, jj(gg), γZ, and ZZ. Consequently, it is found that the strongest limit for this spin-2 resonance G comes from the t t ¯ $$ t\overline{t} $$ pair search, which constrains the cutoff scale to be of O $$ \mathcal{O} $$ (100 GeV) for the right-top coupling of O $$ \mathcal{O} $$ (1) and the massive graviton mass in the range m G = 2–5 TeV, significantly relaxed compared with the universal G coupling case. |
topic |
Phenomenology of Field Theories in Higher Dimensions |
url |
http://link.springer.com/article/10.1007/JHEP10(2018)046 |
work_keys_str_mv |
AT chaoqianggeng lhcsearchesfortopphilickaluzakleingraviton AT dahuang lhcsearchesfortopphilickaluzakleingraviton AT kimikoyamashita lhcsearchesfortopphilickaluzakleingraviton |
_version_ |
1724935816856207360 |