First Experimental Study of Photon Polarization in Radiative Bs0 Decays

The LHCb Collaboration

doi:10.1103/PhysRevLett.118.021801

First Experimental Study of Photon Polarization in Radiative B_s⁰Decays

The LHCb Collaboration

Research output: Contribution to journal › Article › Research › peer-review

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Abstract

The polarization of photons produced in radiative Bs0 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 Bs0→φγ decay rate is conducted to determine the parameter AΔ, which is related to the ratio of right- over left-handed photon polarization amplitudes in b→sγ transitions. A value of AΔ=-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.

Original language	English
Article number	021801
Number of pages	9
Journal	Physical Review Letters
Volume	118
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevLett.118.021801
Publication status	Published - 2017
Externally published	Yes

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10.1103/PhysRevLett.118.021801

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Cite this

@article{81558294aea44f0e8ff2513348ea419c,

title = "First Experimental Study of Photon Polarization in Radiative Bs0 Decays",

abstract = "The polarization of photons produced in radiative Bs0 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 Bs0→φγ decay rate is conducted to determine the parameter AΔ, which is related to the ratio of right- over left-handed photon polarization amplitudes in b→sγ transitions. A value of AΔ=-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.",

author = "{The LHCb Collaboration} and Ulrik Egede and Tom Hadavizadeh",

year = "2017",

doi = "10.1103/PhysRevLett.118.021801",

language = "English",

volume = "118",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

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AU - The LHCb Collaboration

AU - Egede, Ulrik

AU - Hadavizadeh, Tom

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N2 - The polarization of photons produced in radiative Bs0 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 Bs0→φγ decay rate is conducted to determine the parameter AΔ, which is related to the ratio of right- over left-handed photon polarization amplitudes in b→sγ transitions. A value of AΔ=-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.

AB - The polarization of photons produced in radiative Bs0 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 Bs0→φγ decay rate is conducted to determine the parameter AΔ, which is related to the ratio of right- over left-handed photon polarization amplitudes in b→sγ transitions. A value of AΔ=-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.

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