b→sℓℓ Decays at Belle

Choudhury, S. and Sandilya, Saurabh and Trabelsi, K. and Giri, Anjan K. (2021) b→sℓℓ Decays at Belle. In: 23rd DAE-BRNS High Energy Physics Symposium, 2018, 10 December 2018 through 15 December 2018, Chennai.

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The observable RK which is the ratio of branching fractions for B→ Kμμ to B→ Kee, tests lepton flavor universality (LFU) in the standard model (SM), and hence constitutes an important probe for new physics (NP). We report herein a sensitivity study of RK in B→ Kℓℓ and of the equivalent RK(J/ ψ) in B→ KJ/ ψ(→ ℓℓ). The latter is measured with Belle’s full data sample of 772 × 106 BB¯ pairs and the result is consistent with unity. In a variety of NP models, lepton flavor violation (LFV) comes together with LFU violation. We also report on searches for LFV in B→ Kμe and B→ Keμ modes. Belle has recently measured LFV B0→ K∗ 0ℓℓ′ and the most stringent upper limit is found. © 2021, Springer Nature Singapore Pte Ltd.

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IITH Creators:
IITH CreatorsORCiD
Sandilya, Saurabhhttps://orcid.org/0000-0002-4199-4369
Giri, Anjan KumarUNSPECIFIED
Item Type: Conference or Workshop Item (Paper)
Additional Information: Acknowledgements We thank the KEKB group for excellent operation of the accelerator; the KEK cryogenics group for efficient solenoid operations; and the KEK computer group the NII, and PNNL/EMSL for valuable computing and SINET5 network support. We acknowledge support from MEXT, JSPS and Nagoya’s TLPRC (Japan); ARC (Australia); FWF (Austria); NSFC and CCEPP (China), MSMT (Czechia); CZF, DFG, EXC153, and versus (Germany); DST (India); INFN (Italy); MOE, MSIP, NRF, RSRI, FLRFAS project and GSDC of KISTI (Korea); MNiSW and NCN (Poland); MES and RFAAE (Russia); ARRS (Slovenia); IKERBASQUE and MINECO (Spain); SNSF (Switzerland); MOE and MOST (Taiwan); and DOE and NSF (USA).
Uncontrolled Keywords: Branching fractions; Data sample; Lepton flavor violation; Lepton-flavor; New physics; Sensitivity studies; The standard model; Upper limits
Subjects: Physics
Divisions: Department of Physics
Depositing User: . LibTrainee 2021
Date Deposited: 08 Aug 2022 04:07
Last Modified: 08 Aug 2022 04:07
URI: http://raiith.iith.ac.in/id/eprint/10120
Publisher URL: http://doi.org/10.1007/978-981-33-4408-2_19
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