Charged current b \to c τ \barντ anomalies in a general W\prime boson scenario

Gómez, John D. Y Quintero, Néstor Y Rojas, Eduardo (2019) Charged current b \to c τ \barντ anomalies in a general W\prime boson scenario. Phys. Rev. D, 100 (9). 093003. ISSN 2470-0010

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Resumen

Very recent experimental information obtained from the Belle experiment, along with that accumulated by the BABAR and LHCb experiments, has shown the existence of anomalies in the ratios R(D) and R(D*) associated with the charged-current transition b → cτν̄ τ . Although the Belle measurements are in agreement with standard model (SM) predictions, the new experimental world averages still exhibit a tension. In addition, the D* longitudinal polarization FL(D*) related with the channel B → D*τν̄ τ observed by the Belle Collaboration and the ratio R(J/ψ) measured by the LHCb Collaboration also show discrepancies with their corresponding SM estimations. We present a model-independent study based on the most general effective Lagrangian that yields a tree-level effective contribution to the transition b → cτν̄ τ induced by a general W 0 boson. Instead of considering any specific new physics (NP) realization, we perform an analysis by considering all of the different chiral charges to the charm-bottom and τ − ντ 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 → cτν̄ τ data and with the mono-tau signature pp → τhX + MET at the LHC. For comparison, we include some of the W 0 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:	10 Dec 2021 15:50
Ultima Modificación:	10 Dec 2021 15:50
URI:	http://sired.udenar.edu.co/id/eprint/7079

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