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B-physics anomalies: The bridge between R-parity violating supersymmetry and flavored dark matter


Trifinopoulos, Sokratis (2019). B-physics anomalies: The bridge between R-parity violating supersymmetry and flavored dark matter. Physical Review D 11, University of Zurich.

Abstract

In recent years, significant experimental indications that point toward lepton flavor universality violating effects in B-decays, involving b→cτν and b→sℓ+ℓ−, have been accumulated. A possible new physics explanation can be sought within the framework of R-parity violating supersymmetry, which contains the necessary ingredients to explain the anomalies via both leptoquark, tree-level exchange, and one-loop diagrams involving purely leptonic interactions. In addition, an approximate U(2)2 flavor symmetry, that respects gauge coupling unification, successfully controls the strength of these interactions. Nevertheless, strong constraints from leptonic processes and Z boson decays exclude most of the relevant parameter space at the 2σ level. Moreover, R-parity violation deprives supersymmetry of its dark matter candidates. Motivated by these deficiencies, we introduce a new gauge singlet superfield, charged under the flavor symmetry and show that its third-generation, scalar component may participate in loop diagrams that alleviate the abovementioned tensions, while at the same time reproduce the observed relic abundance. We obtain a solution to both anomalies that is also fully consistent with the rich flavor and dark matter phenomenology. Finally, we assess the prospect to probe the model at future experiments.

Abstract

In recent years, significant experimental indications that point toward lepton flavor universality violating effects in B-decays, involving b→cτν and b→sℓ+ℓ−, have been accumulated. A possible new physics explanation can be sought within the framework of R-parity violating supersymmetry, which contains the necessary ingredients to explain the anomalies via both leptoquark, tree-level exchange, and one-loop diagrams involving purely leptonic interactions. In addition, an approximate U(2)2 flavor symmetry, that respects gauge coupling unification, successfully controls the strength of these interactions. Nevertheless, strong constraints from leptonic processes and Z boson decays exclude most of the relevant parameter space at the 2σ level. Moreover, R-parity violation deprives supersymmetry of its dark matter candidates. Motivated by these deficiencies, we introduce a new gauge singlet superfield, charged under the flavor symmetry and show that its third-generation, scalar component may participate in loop diagrams that alleviate the abovementioned tensions, while at the same time reproduce the observed relic abundance. We obtain a solution to both anomalies that is also fully consistent with the rich flavor and dark matter phenomenology. Finally, we assess the prospect to probe the model at future experiments.

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Additional indexing

Item Type:Working Paper
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Uncontrolled Keywords:Physics and Astronomy (miscellaneous)
Language:English
Date:10 December 2019
Deposited On:07 Jan 2020 13:05
Last Modified:14 Feb 2020 08:28
Publisher:American Physical Society
Series Name:Physical Review D
ISSN:2470-0010
OA Status:Green
Free access at:Publisher DOI. An embargo period may apply.
Publisher DOI:https://doi.org/10.1103/physrevd.100.115022

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