Search for the Exclusive W Boson Hadronic Decays W± → π±γ, W± → K±γ and W± → ρ±γ with the ATLAS Detector
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· Physical Review Letters
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A search for the exclusive hadronic decays W± → π±γ, W± → K±γ, and W± → ρ±γ is performed using up to 140 fb-1 of proton-proton collisions recorded with the ATLAS detector at a center-of-mass energy of $$\sqrt{s} =$$ 13 TeV. If observed, these rare processes would provide a unique test bench for the quantum chromodynamics factorization formalism used to calculate cross sections at colliders. Additionally, at future colliders, these decays could offer a new way to measure the W boson mass through fully reconstructed decay products. The search results in the most stringent upper limits to date on the branching fractions B(W± → π±γ) < 1.9 × 10-6, B(W± → K±γ) < 1.7 × 10-6, B(W± → ρ±γ) < 5.2 × 10-6 at 95% confidence level.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- Contributing Organization:
- ATLAS Collaboration
- Grant/Contract Number:
- AC02-05CH11231
- OSTI ID:
- 2551777
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 16 Vol. 133; ISSN 0031-9007
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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