Pursuit of new physics within the $$\Lambda _c\rightarrow \Delta K$$ Λ c → Δ K decays
Abstract We point out the CP asymmetry in the chain decay of $$\Lambda _c^+\rightarrow \Delta ^+K(t)(\rightarrow \pi ^+\pi ^-)$$ Λ c + → Δ + K ( t ) ( → π + π - ) is determined by the branching fractions of $$\Lambda ^+_c\rightarrow \Delta ^{++} K^-$$ Λ c + → Δ + + K - , $$\Lambda ^+_c\rightarrow \D...
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Format: | Article |
Language: | English |
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SpringerOpen
2022-11-01
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Series: | European Physical Journal C: Particles and Fields |
Online Access: | https://doi.org/10.1140/epjc/s10052-022-11013-5 |
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author | Di Wang |
author_facet | Di Wang |
author_sort | Di Wang |
collection | DOAJ |
description | Abstract We point out the CP asymmetry in the chain decay of $$\Lambda _c^+\rightarrow \Delta ^+K(t)(\rightarrow \pi ^+\pi ^-)$$ Λ c + → Δ + K ( t ) ( → π + π - ) is determined by the branching fractions of $$\Lambda ^+_c\rightarrow \Delta ^{++} K^-$$ Λ c + → Δ + + K - , $$\Lambda ^+_c\rightarrow \Delta ^{+} K^0_{S,L}$$ Λ c + → Δ + K S , L 0 and $$\Lambda ^+_c\rightarrow \Delta ^{0} K^+$$ Λ c + → Δ 0 K + modes under the isospin symmetry. The ambiguities from loop-induced quantities and $$SU(3)_F$$ S U ( 3 ) F breaking hadronic effects are avoided. Once the CP asymmetry in the $$\Lambda _c^+$$ Λ c + decays into $$\Delta ^+$$ Δ + and neutral kaons is confirmed by experiments, we can check if it is beyond the Standard Model, or verify the CP-violating effect resulted from the interference between the Cabibbo-favored and the doubly Cabibbo-suppressed amplitudes with the neutral kaon mixing. Future measurements of branching fractions play a critical role in reducing the uncertainties. |
first_indexed | 2024-04-11T07:19:25Z |
format | Article |
id | doaj.art-f9f3182334b243af8b6e96f2a5c0fe36 |
institution | Directory Open Access Journal |
issn | 1434-6052 |
language | English |
last_indexed | 2024-04-11T07:19:25Z |
publishDate | 2022-11-01 |
publisher | SpringerOpen |
record_format | Article |
series | European Physical Journal C: Particles and Fields |
spelling | doaj.art-f9f3182334b243af8b6e96f2a5c0fe362022-12-22T04:37:49ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60522022-11-0182111610.1140/epjc/s10052-022-11013-5Pursuit of new physics within the $$\Lambda _c\rightarrow \Delta K$$ Λ c → Δ K decaysDi Wang0Department of Physics, Hunan Normal University, and Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of EducationAbstract We point out the CP asymmetry in the chain decay of $$\Lambda _c^+\rightarrow \Delta ^+K(t)(\rightarrow \pi ^+\pi ^-)$$ Λ c + → Δ + K ( t ) ( → π + π - ) is determined by the branching fractions of $$\Lambda ^+_c\rightarrow \Delta ^{++} K^-$$ Λ c + → Δ + + K - , $$\Lambda ^+_c\rightarrow \Delta ^{+} K^0_{S,L}$$ Λ c + → Δ + K S , L 0 and $$\Lambda ^+_c\rightarrow \Delta ^{0} K^+$$ Λ c + → Δ 0 K + modes under the isospin symmetry. The ambiguities from loop-induced quantities and $$SU(3)_F$$ S U ( 3 ) F breaking hadronic effects are avoided. Once the CP asymmetry in the $$\Lambda _c^+$$ Λ c + decays into $$\Delta ^+$$ Δ + and neutral kaons is confirmed by experiments, we can check if it is beyond the Standard Model, or verify the CP-violating effect resulted from the interference between the Cabibbo-favored and the doubly Cabibbo-suppressed amplitudes with the neutral kaon mixing. Future measurements of branching fractions play a critical role in reducing the uncertainties.https://doi.org/10.1140/epjc/s10052-022-11013-5 |
spellingShingle | Di Wang Pursuit of new physics within the $$\Lambda _c\rightarrow \Delta K$$ Λ c → Δ K decays European Physical Journal C: Particles and Fields |
title | Pursuit of new physics within the $$\Lambda _c\rightarrow \Delta K$$ Λ c → Δ K decays |
title_full | Pursuit of new physics within the $$\Lambda _c\rightarrow \Delta K$$ Λ c → Δ K decays |
title_fullStr | Pursuit of new physics within the $$\Lambda _c\rightarrow \Delta K$$ Λ c → Δ K decays |
title_full_unstemmed | Pursuit of new physics within the $$\Lambda _c\rightarrow \Delta K$$ Λ c → Δ K decays |
title_short | Pursuit of new physics within the $$\Lambda _c\rightarrow \Delta K$$ Λ c → Δ K decays |
title_sort | pursuit of new physics within the lambda c rightarrow delta k λ c δ k decays |
url | https://doi.org/10.1140/epjc/s10052-022-11013-5 |
work_keys_str_mv | AT diwang pursuitofnewphysicswithinthelambdacrightarrowdeltaklcdkdecays |