Reevaluating uncertainties in $\overline{B}$→ Xsγ decay

Gunawardana, Ayesh; Paz, Gil

doi:10.1007/jhep11(2019)141

Title: Reevaluating uncertainties in $$\overline{B}$$→ X_sγ decay

Journal Article · 24 November 2019 · Journal of High Energy Physics (Online)

DOI: https://doi.org/10.1007/jhep11(2019)141 · OSTI ID:1801797

Gunawardana, Ayesh ^[1];

^[2]

Wayne State Univ., Detroit, MI (United States). Dept. of Physics and Astronomy; OSTI
Wayne State Univ., Detroit, MI (United States). Dept. of Physics and Astronomy; Technion--Israel Inst. of Technology, Haifa (Israel). Physics Dept.; Weizmann Inst. of Science, Rehovot (Israel). Dept. of Particle Physics and Astronomy

The rare decay $$\overline{B}$$→ X_sγ is an important probe of physics beyond the standard model. The largest uncertainty on the total rate and the CP asymmetry arises from resolved photon contributions. These appear first at order 1/m_b and are related to operators other than Q_7γ in the effective weak Hamiltonian. One of the three leading contributions, Q$${q}\atop1$$- Q_7γ, is described by a non-local function whose moments are related to HQET parameters. We use recent progress in our knowledge of these parameters to reevaluate the resolved photon contribution to $$\overline{B}$$→ X_sγ total rate and CP asymmetry.

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Research Organization:: Wayne State Univ., Detroit, MI (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: SC0007983

OSTI ID:: 1801797

Journal Information:: Journal of High Energy Physics (Online), Journal Name: Journal of High Energy Physics (Online) Journal Issue: 11 Vol. 2019; ISSN 1029-8479

Publisher:: Springer BerlinCopyright Statement

Country of Publication:: United States

Language:: English

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