https://doi.org/10.1140/epjc/s10052-019-7123-7
Regular Article - Theoretical Physics
Radiative b-baryon decays to measure the photon and b-baryon polarization
1
IFIC, Universitat de València-CSIC, Apt. Correus 22085, 46071, València, Spain
2
Tata Institute of Fundamental Research, Mumbai, India
3
The Institute of Mathematical Sciences, Taramani, Chennai, 600113, India
4
Homi Bhabha National Institute Training School Complex, Anushakti Nagar, Mumbai, 400085, India
* e-mail: shibasisr@imsc.res.in
Received:
12
April
2019
Accepted:
8
July
2019
Published online:
29
July
2019
The radiative decays of b-baryons facilitate the direct measurement of photon helicity in 
transitions thus serving as an important test of physics beyond the Standard Model. In this paper we analyze the complete angular distribution of ground state b-baryon radiative decays to multibody final states assuming an initially polarized b-baryon sample. Our sensitivity study suggests that the photon polarization asymmetry can be extracted to a good accuracy along with a simultaneous measurement of the initial b-baryon polarization. With higher yields of b-baryons, achievable in subsequent runs of the Large Hadron Collider (LHC), we find that the photon polarization measurement can play a pivotal role in constraining different new physics scenarios.
© The Author(s), 2019
