Journal
PHYSICAL REVIEW LETTERS
Volume 126, Issue 16, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.126.161801
Keywords
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Categories
Funding
- Ministry of Education, Culture, Sports, Science, and Technology (MEXT) of Japan
- Japan Society for the Promotion of Science (JSPS)
- Tau-Lepton Physics Research Center of Nagoya University
- Australian Research Council [DP180102629, DP170102389, DP170102204, DP150103061, FT130100303]
- Austrian Science Fund (FWF)
- National Natural Science Foundation of China [11435013, 11475187, 11521505, 11575017, 11675166, 11705209]
- Key Research Program of Frontier Sciences, Chinese Academy of Sciences (CAS) [QYZDJ-SSW-SLH011]
- CAS Center for Excellence in Particle Physics (CCEPP)
- Shanghai Pujiang Program [18PJ1401000]
- Ministry of Education, Youth and Sports of the Czech Republic [LTT17020]
- Carl Zeiss Foundation
- Deutsche Forschungsgemeinschaft
- Excellence Cluster Universe
- VolkswagenStiftung
- Department of Science and Technology of India
- Istituto Nazionale di Fisica Nucleare of Italy
- National Research Foundation (NRF) of Korea [2016R1D1A1B01010135, 2016R1D1A1B02012900, 2018R1A2B3003643, 2018R1A6A1A06024970, 2018R1D1A1B07047294, 2019K1A3A7A09033840, 2019R1I1A3A01058933]
- Radiation Science Research Institute
- Foreign Large-size Research Facility Application Supporting project
- Global Science Experimental Data Hub Center of the Korea Institute of Science and Technology Information
- KREONET/GLORIAD
- Polish Ministry of Science and Higher Education
- National Science Center
- Ministry of Science and Higher Education of the Russian Federation [14.W03.31.0026]
- University of Tabuk (Saudi Arabia) [S-1440-0321, S-0256-1438, S-0280-1439]
- Slovenian Research Agency
- Ikerbasque, Basque Foundation for Science, Spain
- Swiss National Science Foundation
- Ministry of Education of Taiwan
- Ministry of Science and Technology of Taiwan
- U.S. Department of Energy
- National Science Foundation
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The study presents a measurement of R-K(*), including the branching fraction ratio for both charged and neutral B mesons. Absolute branching fractions for individual modes in different bins of the squared dilepton invariant mass were also reported. The obtained results are in line with standard model expectations.
We present a measurement of R-K(*), the branching fraction ratio B(B -> K* mu(+)mu(-))/B(B -> K* e(+) e(-)), for both charged and neutral B mesons. The ratio for the charged case RK*+ is the first measurement ever performed. In addition, we report absolute branching fractions for the individual modes in bins of the squared dilepton invariant mass q(2). The analysis is based on a data sample of 711 fb(-1), containing 772 x 10(6) B (B) over bar events, recorded at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. The obtained results are consistent with standard model expectations.
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