First Experimental Study of Photon Polarization in Radiative <i>B<sub>s</sub></i><SUP>0</SUP> Decays

Aaij, R, Adeva, B, Adinolfi, M, Ajaltouni, Z, Akar, S, Albrecht, J, Alessio, F, Alexander, M, Ali, S, Alkhazov, G
et al (show 760 more authors) (2017) First Experimental Study of Photon Polarization in Radiative <i>B<sub>s</sub></i><SUP>0</SUP> Decays. PHYSICAL REVIEW LETTERS, 118 (2). 021801-.

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The polarization of photons produced in radiative B_{s}^{0} decays is studied for the first time. The data are recorded by the LHCb experiment in pp collisions corresponding to an integrated luminosity of 3  fb^{-1} at center-of-mass energies of 7 and 8 TeV. A time-dependent analysis of the B_{s}^{0}→ϕγ decay rate is conducted to determine the parameter A^{Δ}, which is related to the ratio of right- over left-handed photon polarization amplitudes in b→sγ transitions. A value of A^{Δ}=-0.98_{-0.52}^{+0.46}_{-0.20}^{+0.23} is measured. This result is consistent with the standard model prediction within 2 standard deviations.

Item Type: Article
Additional Information: All figures and tables, along with any supplementary material and additional information, are available at
Uncontrolled Keywords: LHCb Collaboration
Depositing User: Symplectic Admin
Date Deposited: 23 Feb 2017 09:21
Last Modified: 07 Oct 2023 05:47
DOI: 10.1103/PhysRevLett.118.021801
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