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Title: Universal Extra Dimension models with gravity mediated decays after LHC Run II data

Abstract

In the ‘fat-brane’ realization of Universal Extra Dimension (UED) models, the gravity mediated decays of Kaluza–Klein (KK) excitations of the Standard Model (SM) particles offer interesting collider signals. Colored level-1 KK-particles (quarks $q^1$ and/or gluons $g^1$) are pair-produced at the colliders due to conserved KK-parity. These particles, then, cascade decay into lighter level-1 KK-particle in association with one or more SM particles until producing lightest KK particle (LKP). The gravity mediation allows LKP to decay into photon or Z-boson plus gravity excitation, hence resulting in di-photon/ZZ/Zγ plus missing transverse energy signatures at collider experiments. Alternatively, pair-produced level-1 KK quarks/gluons may directly decay into the corresponding SM quark/gluon and a gravity excitation resulting in di-jet plus missing transverse energy signal. The ATLAS Collaboration has recently communicated the results for di-photon and multi-jet plus missing transverse energy searches with 36.1 inverse-femtobarn of integrated luminosity at center-of-mass energy. No significant excess of events above the SM expectation was observed in both searches. We constrain the ‘fat-brane’ UED model parameters, namely the fundamental Planck mass $$M_D$$ and the size of small extra dimensions R, in the light of above-mentioned ATLAS searches.

Authors:
ORCiD logo; ; ORCiD logo
Publication Date:
Research Org.:
Oklahoma State Univ., Stillwater, OK (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1483138
Alternate Identifier(s):
OSTI ID: 1612383
Grant/Contract Number:  
SC0016013
Resource Type:
Published Article
Journal Name:
Physics Letters B
Additional Journal Information:
Journal Name: Physics Letters B Journal Volume: 788 Journal Issue: C; Journal ID: ISSN 0370-2693
Publisher:
Elsevier
Country of Publication:
Netherlands
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; Astronomy & Astrophysics; Physics

Citation Formats

Ghosh, Kirtiman, Karabacak, Durmus, and Nandi, S. Universal Extra Dimension models with gravity mediated decays after LHC Run II data. Netherlands: N. p., 2019. Web. https://doi.org/10.1016/j.physletb.2018.11.035.
Ghosh, Kirtiman, Karabacak, Durmus, & Nandi, S. Universal Extra Dimension models with gravity mediated decays after LHC Run II data. Netherlands. https://doi.org/10.1016/j.physletb.2018.11.035
Ghosh, Kirtiman, Karabacak, Durmus, and Nandi, S. Tue . "Universal Extra Dimension models with gravity mediated decays after LHC Run II data". Netherlands. https://doi.org/10.1016/j.physletb.2018.11.035.
@article{osti_1483138,
title = {Universal Extra Dimension models with gravity mediated decays after LHC Run II data},
author = {Ghosh, Kirtiman and Karabacak, Durmus and Nandi, S.},
abstractNote = {In the ‘fat-brane’ realization of Universal Extra Dimension (UED) models, the gravity mediated decays of Kaluza–Klein (KK) excitations of the Standard Model (SM) particles offer interesting collider signals. Colored level-1 KK-particles (quarks $q^1$ and/or gluons $g^1$) are pair-produced at the colliders due to conserved KK-parity. These particles, then, cascade decay into lighter level-1 KK-particle in association with one or more SM particles until producing lightest KK particle (LKP). The gravity mediation allows LKP to decay into photon or Z-boson plus gravity excitation, hence resulting in di-photon/ZZ/Zγ plus missing transverse energy signatures at collider experiments. Alternatively, pair-produced level-1 KK quarks/gluons may directly decay into the corresponding SM quark/gluon and a gravity excitation resulting in di-jet plus missing transverse energy signal. The ATLAS Collaboration has recently communicated the results for di-photon and multi-jet plus missing transverse energy searches with 36.1 inverse-femtobarn of integrated luminosity at center-of-mass energy. No significant excess of events above the SM expectation was observed in both searches. We constrain the ‘fat-brane’ UED model parameters, namely the fundamental Planck mass $M_D$ and the size of small extra dimensions R, in the light of above-mentioned ATLAS searches.},
doi = {10.1016/j.physletb.2018.11.035},
journal = {Physics Letters B},
number = C,
volume = 788,
place = {Netherlands},
year = {2019},
month = {1}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1016/j.physletb.2018.11.035

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Cited by: 1 work
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