期刊
JOURNAL OF HIGH ENERGY PHYSICS
卷 -, 期 12, 页码 -出版社
SPRINGER
DOI: 10.1007/JHEP12(2018)043
关键词
Phenomenology of Field Theories in Higher Dimensions; Phenomenology of Large extra dimensions
资金
- Fermi Research Alliance, LLC [DE-AC02-07CH11359]
- U.S. Department of Energy [DE-FG02-13ER41958, DE-AC02-06CH11357]
- Spanish MINEICO
- European FEDER [FIS2017-5053-C2-1-P]
- Junta de Andalucia [FQM-225]
- Ramon y Cajal Program of the Spanish MINEICO [RYC-2016-20678]
- Spanish MINEICO [CICYT-FEDER-FPA2014-55613-P, FPA2017-88915-P]
- Catalan Government [2017SGR1069]
- Severo Ochoa Excellence Program of MINEICO [SEV-2016-0588]
- Argonne National Laboratory
- Fermi National Accelerator Laboratory
- National Science Foundation [PHY-1607611]
Flavor physics experiments allow to probe the accuracy of the Standard Model ( SM) description at low energies, and are sensitive to new heavy gauge bosons that couple to quarks and leptons in a relevant way. The apparent anomaly in the ratios of the decay of B - mesons into D - mesons and di ff erent lepton avors, RD() = B ( B ! D()) =B ( B ! D()`) is particularly intriguing, since these decay processes occur at tree- level in the SM. Recently, it has been suggested that this anomaly may be explained by new gauge bosons coupled to right- handed currents of quarks and leptons, involving light right- handed neutrinos. In this work we present a well- motivated ultraviolet complete realization of this idea, embedding the SM in a warped space with an SU( 2) L SU( 2) R U( 1) B bulk gauge symmetry. Besides providing a solution to the hierarchy problem, we show that this model, which has an explicit custodial symmetry, can explain the RD() anomaly and at the same time allow for a solution to the RK() anomalies, related to the decay of B - mesons into K - mesons and leptons, RK() = B ( B ! K()) =B ( B ! K()ee). In addition, a model prediction is an anomalous value of the forward- backward asymmetry Ab FB, driven by the Zb RbR coupling, in agreement with LEP data.
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