Mass biases in reconstructing exclusive radiative hadronic decays of W bosons at the LHC

E. Jones (University of Warwick); STFC RAL); W. J. Murray (University of Warwick

Mass biases in reconstructing exclusive radiative hadronic decays of W bosons at the LHC

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arxiv 2009.01073 v2 pith:2XC66WFZ submitted 2020-09-02 hep-ex

W. J. Murray (University of Warwick , STFC RAL) , E. Jones (University of Warwick) This is my paper · ORCID

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keywords decaysbosonexclusivehadronicissuesmasspotentialradiative

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abstract

The search for exclusive hadronic vector boson decays is an ongoing part of the LHC programme where, to date, no such decays have been observed. In addition to the intrinsic interest in the branching ratios, there is potential for a measurement of the $W$ boson mass quite distinct from the usual methods. The radiative decay modes offer good potential channels for this search; however, we highlight three issues with it not previously discussed: particle misidentification, partial reconstruction and the impact of interference with QCD. These issues cause shifts in the peak position of tens or hundreds of MeV/c$^2$.

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Rare $W \to B_c + \gamma$ decay up to the NNLO and NLL accuracy in QCD
hep-ph 2025-02 conditional novelty 6.0 of 10

The rare decay W to Bc plus photon gets NNLO QCD corrections that reduce the width by 31 percent, giving a branching fraction of 1.522 times 10 to the minus 10 after NLL resummation.

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