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Title: Probing axionlike particles with γ γ final states from vector boson fusion processes at the LHC

Journal Article · · Physical Review D

We perform a feasibility study to search for axionlike particles (ALPs) using vector boson fusion (VBF) processes at the LHC. We work in an effective field theory framework with a cutoff scale Λ and ALP mass ma, and assume that ALPs couple to photons with strength ∝ 1/Λ . Assuming proton-proton collisions at √ s = 13 TeV, we present the total VBF ALP production cross sections, ALP decay widths and lifetimes, and relevant kinematic distributions as a function of ma and Λ . We consider the a → γγ decay mode to show that the requirement of an energetic diphoton pair combined with two forward jets with large dijet mass and pseudorapidity separation can significantly reduce the Standard Model backgrounds, leading to a 5σ discovery reach for 10 MeV ≲ ma ≲ 1 TeV with Λ ≲ 2 TeV , assuming an integrated luminosity of 3000 fb–1 . In particular, this extends the LHC sensitivity to a previously unstudied region of the ALP parameter space.

Research Organization:
Univ. of Oklahoma, Norman, OK (United States)
Sponsoring Organization:
USDOE Office of Science (SC); National Science Foundation (NSF)
Grant/Contract Number:
SC0009956; PHY-1806612
OSTI ID:
1781978
Alternate ID(s):
OSTI ID: 1851227
Journal Information:
Physical Review D, Journal Name: Physical Review D Vol. 103 Journal Issue: 9; ISSN 2470-0010
Publisher:
American Physical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

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