Semileptonic decays of anti-triplet charmed baryons
We study the semileptonic decays Bc→Bnℓ+νℓ where Bc(n) is the anti-triplet-charmed (octet) baryon with the SU(3)f flavor symmetry and helicity formalism. In particular, we present the decay branching ratios of Bc→Bnℓ+νℓ in three scenarios: (a) an exact SU(3)f symmetry with equal masses for the anti-...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2019-05-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269319302254 |
| _version_ | 1819086844377169920 |
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| author | Chao-Qiang Geng Chia-Wei Liu Tien-Hsueh Tsai Shu-Wei Yeh |
| author_facet | Chao-Qiang Geng Chia-Wei Liu Tien-Hsueh Tsai Shu-Wei Yeh |
| author_sort | Chao-Qiang Geng |
| collection | DOAJ |
| description | We study the semileptonic decays Bc→Bnℓ+νℓ where Bc(n) is the anti-triplet-charmed (octet) baryon with the SU(3)f flavor symmetry and helicity formalism. In particular, we present the decay branching ratios of Bc→Bnℓ+νℓ in three scenarios: (a) an exact SU(3)f symmetry with equal masses for the anti-triplet-charmed (octet) baryon states of Bc (Bn), (b) SU(3)f parameters without the baryonic momentum-transfer dependence, and (c) SU(3)f with baryonic transition form factors in the heavy quark limit. We show that our results are all consistent with the existing data. Explicitly, we predict that B(Ξc+→Ξ0e+νe)=(11.9±1.3,9.8±1.1,10.7±0.9)×10−2 and B(Ξc0→Ξ−e+νe)=(3.0±0.3,2.4±0.3,2.7±0.2)×10−2 in the scenarios (a), (b) and (c) agree with the data of (14.0−8.7+8.3)×10−2 and (5.6±2.6)×10−2 from the CLEO Collaboration, respectively. In addition, we obtain that B(Λc+→ne+νe)=(2.8±0.4,4.9±0.4,5.1±0.4)×10−3 in (a), (b) and (c). We also examine the longitudinal asymmetry parameters of α(Bc→Bnℓ+νℓ), which are sensitive to the different scenarios with SU(3)f. Some of the decay branching ratios and asymmetries can be observed by the ongoing experiments at BESIII and LHCb as well as the future searches by BELLEII. |
| first_indexed | 2024-12-21T21:26:42Z |
| format | Article |
| id | doaj.art-6266b5ec24ef4ab1a3e75c831f955d2e |
| institution | Directory Open Access Journal |
| issn | 0370-2693 |
| language | English |
| last_indexed | 2024-12-21T21:26:42Z |
| publishDate | 2019-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj.art-6266b5ec24ef4ab1a3e75c831f955d2e2022-12-21T18:49:44ZengElsevierPhysics Letters B0370-26932019-05-01792214218Semileptonic decays of anti-triplet charmed baryonsChao-Qiang Geng0Chia-Wei Liu1Tien-Hsueh Tsai2Shu-Wei Yeh3Chongqing University of Posts & Telecommunications, Chongqing 400065; Department of Physics, National Tsing Hua University, Hsinchu 300; Physics Division, National Center for Theoretical Sciences, Hsinchu 300; Corresponding author.Department of Physics, National Tsing Hua University, Hsinchu 300Department of Physics, National Tsing Hua University, Hsinchu 300Department of Physics, National Tsing Hua University, Hsinchu 300We study the semileptonic decays Bc→Bnℓ+νℓ where Bc(n) is the anti-triplet-charmed (octet) baryon with the SU(3)f flavor symmetry and helicity formalism. In particular, we present the decay branching ratios of Bc→Bnℓ+νℓ in three scenarios: (a) an exact SU(3)f symmetry with equal masses for the anti-triplet-charmed (octet) baryon states of Bc (Bn), (b) SU(3)f parameters without the baryonic momentum-transfer dependence, and (c) SU(3)f with baryonic transition form factors in the heavy quark limit. We show that our results are all consistent with the existing data. Explicitly, we predict that B(Ξc+→Ξ0e+νe)=(11.9±1.3,9.8±1.1,10.7±0.9)×10−2 and B(Ξc0→Ξ−e+νe)=(3.0±0.3,2.4±0.3,2.7±0.2)×10−2 in the scenarios (a), (b) and (c) agree with the data of (14.0−8.7+8.3)×10−2 and (5.6±2.6)×10−2 from the CLEO Collaboration, respectively. In addition, we obtain that B(Λc+→ne+νe)=(2.8±0.4,4.9±0.4,5.1±0.4)×10−3 in (a), (b) and (c). We also examine the longitudinal asymmetry parameters of α(Bc→Bnℓ+νℓ), which are sensitive to the different scenarios with SU(3)f. Some of the decay branching ratios and asymmetries can be observed by the ongoing experiments at BESIII and LHCb as well as the future searches by BELLEII.http://www.sciencedirect.com/science/article/pii/S0370269319302254 |
| spellingShingle | Chao-Qiang Geng Chia-Wei Liu Tien-Hsueh Tsai Shu-Wei Yeh Semileptonic decays of anti-triplet charmed baryons Physics Letters B |
| title | Semileptonic decays of anti-triplet charmed baryons |
| title_full | Semileptonic decays of anti-triplet charmed baryons |
| title_fullStr | Semileptonic decays of anti-triplet charmed baryons |
| title_full_unstemmed | Semileptonic decays of anti-triplet charmed baryons |
| title_short | Semileptonic decays of anti-triplet charmed baryons |
| title_sort | semileptonic decays of anti triplet charmed baryons |
| url | http://www.sciencedirect.com/science/article/pii/S0370269319302254 |
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