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New extraction of CP violation in b-baryon decays
- Source :
- Physics Letters B, Vol 834, Iss , Pp 137429- (2022)
- Publication Year :
- 2022
- Publisher :
- Elsevier, 2022.
-
Abstract
- We study CP violation in b-baryon decays of Ξb−→Ξ−D with D=D0,D¯0 and Di(i=1,2). We find that these baryonic decay processes provide an ideal opportunity to measure the weak phase due to the absence of the relative strong phase. Explicitly, we relate ρ¯ and η¯ the CKM elements with the decay rate ratios of Ri=Γ(Ξb−→Ξ−Di)/Γ(Ξb−→Ξ−D0) without the charge conjugate states. As a complementary, we also examine the decay distributions of Λb→Λ(→pπ−)D. There are in total 32 decay observables, which can be parameterized by 9 real parameters, allowing the experiments to extract the angle γ≡arg(−VudVub⁎/VcdVcb⁎) in the CKM unitarity triangle. In addition, the feasibilities of the experimental measurements are discussed. We find that ρ¯ and η¯ can be extracted at LHCb Run3 from Ξb−→Ξ−D, and a full analysis of Λb→Λ(→pπ−)D is available at LHCb Run4.
Details
- Language :
- English
- ISSN :
- 03702693
- Volume :
- 834
- Issue :
- 137429-
- Database :
- Directory of Open Access Journals
- Journal :
- Physics Letters B
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.0b523cb147043bf9423fc9582fda2f5
- Document Type :
- article
- Full Text :
- https://doi.org/10.1016/j.physletb.2022.137429