Charged current b -> c τ \barντ anomalies in a general W' boson scenario

Gómez, John D. Y Quintero, Néstor Y Rojas, Eduardo (2019) Charged current b -> c τ \barντ anomalies in a general W' boson scenario. Phys.Rev. D, 100 (09). 093003-1. ISSN 2470-0010

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Resumen

The very recent experimental information obtained from Belle experiment, along with the one accumulated by the BABAR and LHCb experiments have shown the existence of anomalies in the ratios R(D) and R(D ∗ ) associated with the charged current transition b → cτ ν ̄ τ . Although the Belle measurements are in agreement with the SM predictions, the new experimental world averages still exhibit a tension. In addition, the D ∗ longitudinal polarization F L (D ∗ ) related with the channel B → D ∗ τ ν ̄ τ observed by the Belle and the ratio R(J/ψ) measured by the LHCb also show discrepancies with their corresponding SM estimations. In this work, we present a model-independent study based on the most general effective Lagrangian that yields to a tree- evel effective contribution to the transition b → cτ ν ̄ τ induced by a general W gauge boson. Instead of considering any specific new physics (NP) realization, we performed an analysis by considering all the different chiral charges to the charm-bottom and τ -ν τ interaction terms with a charged W boson that explain the anomalies. We present a phenomenological study of parameter space allowed by the new experimental b → cτ ν ̄ τ data and with the mono-tau signature pp → τ h X + MET at the LHC. For comparison, we include some of the W boson NP realizations that have already been studied in the literature.

Tipo de Elemento:	Artículo
Asunto:	Q Ciencias > QC Physics
Division:	Facultad de Ciencias Exactas y Naturales > Programa de Física > Productividad
Depósito de Usuario:	Prof. Eduardo Rojas
Fecha Deposito:	01 Feb 2022 14:02
Ultima Modificación:	01 Feb 2022 14:02
URI:	http://sired.udenar.edu.co/id/eprint/6131

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