To understand the rare decay Bs→π+π−ℓ+ℓ−
Motivated by the LHCb measurement, we analyze the Bs→π+π−ℓ+ℓ− decay in the kinematics region where the pion pairs have invariant masses in the range 0.5–1.3 GeV and muon pairs do not originate from a resonance. The scalar π+π− form factor induced by the strange s¯s current is predicted by the unitar...
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2015-04-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269315001744 |
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doaj-36dfec0a28864b51a9aa0c90e4da70a92020-11-25T00:36:32ZengElsevierPhysics Letters B0370-26932015-04-01743467471To understand the rare decay Bs→π+π−ℓ+ℓ−Wei Wang0Rui-Lin Zhu1INPAC, Shanghai Key Laboratory for Particle Physics and Cosmology, Department of Physics and Astronomy, Shanghai Jiao-Tong University, Shanghai, 200240, China; State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing, 100190, ChinaINPAC, Shanghai Key Laboratory for Particle Physics and Cosmology, Department of Physics and Astronomy, Shanghai Jiao-Tong University, Shanghai, 200240, China; State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing, 100190, China; Corresponding author.Motivated by the LHCb measurement, we analyze the Bs→π+π−ℓ+ℓ− decay in the kinematics region where the pion pairs have invariant masses in the range 0.5–1.3 GeV and muon pairs do not originate from a resonance. The scalar π+π− form factor induced by the strange s¯s current is predicted by the unitarized approach rooted in the chiral perturbation theory. Using the two-hadron light-cone distribution amplitude, we then can derive the Bs→π+π− transition form factor in the light-cone sum rules approach. Merging these quantities, we present our results for differential decay width which can generally agree with the experimental data. More accurate measurements at the LHC and KEKB in future are helpful to validate our formalism and determine the inputs in this approach.http://www.sciencedirect.com/science/article/pii/S0370269315001744 |
| collection |
DOAJ |
| language |
English |
| format |
Article |
| sources |
DOAJ |
| author |
Wei Wang Rui-Lin Zhu |
| spellingShingle |
Wei Wang Rui-Lin Zhu To understand the rare decay Bs→π+π−ℓ+ℓ− Physics Letters B |
| author_facet |
Wei Wang Rui-Lin Zhu |
| author_sort |
Wei Wang |
| title |
To understand the rare decay Bs→π+π−ℓ+ℓ− |
| title_short |
To understand the rare decay Bs→π+π−ℓ+ℓ− |
| title_full |
To understand the rare decay Bs→π+π−ℓ+ℓ− |
| title_fullStr |
To understand the rare decay Bs→π+π−ℓ+ℓ− |
| title_full_unstemmed |
To understand the rare decay Bs→π+π−ℓ+ℓ− |
| title_sort |
to understand the rare decay bs→π+π−ℓ+ℓ− |
| publisher |
Elsevier |
| series |
Physics Letters B |
| issn |
0370-2693 |
| publishDate |
2015-04-01 |
| description |
Motivated by the LHCb measurement, we analyze the Bs→π+π−ℓ+ℓ− decay in the kinematics region where the pion pairs have invariant masses in the range 0.5–1.3 GeV and muon pairs do not originate from a resonance. The scalar π+π− form factor induced by the strange s¯s current is predicted by the unitarized approach rooted in the chiral perturbation theory. Using the two-hadron light-cone distribution amplitude, we then can derive the Bs→π+π− transition form factor in the light-cone sum rules approach. Merging these quantities, we present our results for differential decay width which can generally agree with the experimental data. More accurate measurements at the LHC and KEKB in future are helpful to validate our formalism and determine the inputs in this approach. |
| url |
http://www.sciencedirect.com/science/article/pii/S0370269315001744 |
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