Mixing asymmetries in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>B</mml:mi></mml:math>meson systems, the D0 like-sign dimuon asymmetry, and generic new physics

Botella, Francisco J.; Branco, G.C.; Nebot, Miguel; Sanchez, Aguilar

doi:10.1103/physrevd.91.035013

Cited by 5 publications

(5 citation statements)

References 73 publications

(74 reference statements)

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“…There are many BSM models that allow for a substantial enlargement of the semileptonic asymmetries of both the B 0 d and B 0 s systems (see e.g. [15,17] and references therein). In addition, it is worth mentioning, that the flavorful models invoked to explain the recent B-anomalies also induce sizable mixing in the B 0 s system (see e.g.…”

Section: Considerations From Flavor Observablesmentioning

confidence: 99%

Baryogenesis and dark matter from B mesons

2019

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We present a new mechanism of Baryogenesis and dark matter production in which both the dark matter relic abundance and the baryon asymmetry arise from neutral B meson oscillations and subsequent decays. This set-up is testable at hadron colliders and B-factories. In the early Universe, decays of a long lived particle produce B mesons and anti-mesons out of thermal equilibrium. These mesons/anti-mesons then undergo CP violating oscillations before quickly decaying into visible and dark sector particles. Dark matter will be charged under Baryon number so that the visible sector baryon asymmetry is produced without violating the total baryon number of the Universe. The produced baryon asymmetry will be directly related to the leptonic charge asymmetry in neutral B decays; an experimental observable. Dark matter is stabilized by an unbroken discrete symmetry, and proton decay is simply evaded by kinematics. We will illustrate this mechanism with a model that is unconstrained by di-nucleon decay, does not require a high reheat temperature, and would have unique experimental signals -a positive leptonic asymmetry in B meson decays, a new decay of B mesons into a baryon and missing energy, and a new decay of b-flavored baryons into mesons and missing energy. These three observables are testable at current and upcoming collider experiments, allowing for a distinct probe of this mechanism. 2 b b Out of equilibrium late time decay CP violating oscillations B-mesons decay into Dark Matter and hadrons B 0 d B 0 s B + B B 0 s B 0 d B ⇠ Dark Matter Baryon anti-Baryon T RH ⇠ 20 MeV A sÀd`B R(B ! ⇠ + Baryon + .

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Section: Considerations From Flavor Observablesmentioning

confidence: 99%

Baryogenesis and dark matter from B mesons

2019

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“…This is usually done (see e.g. [44,68]) allowing for the possibility that some new physics alters the magnitude and phase of M q 12 while maintaining Γ q 12 = Γ q 12 | SM 8 . With this assumption, one can indirectly constrain the semileptonic literature differing by a sign or a factor of two.…”

Section: A Current Measurements and Implicationsmentioning

confidence: 99%

Collider Signals of Baryogenesis and Dark Matter from $B$ Mesons: A Roadmap to Discovery

Alonso-Álvarez,

Elor,

Escudero

2021

Preprint

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Low-scale baryogenesis could be discovered at B-factories and the LHC. In the B-Mesogenesis paradigm [1], the CP violating oscillations and subsequent decays of B mesons in the early Universe simultaneously explain the origin of the baryonic and the dark matter of the Universe. This mechanism for baryo-and dark matter-genesis from B mesons gives rise to distinctive signals at collider experiments, which we scrutinize in this paper. We study CP violating observables in the B 0 q − B0 q system, discuss current and expected sensitivities for the exotic decays of B mesons into a visible baryon and missing energy, and explore the implications of direct searches for a TeV-scale colored scalar at the LHC and in meson-mixing observables. Remarkably, we conclude that a combination of measurements at BaBar, Belle, Belle II, LHCb, ATLAS and CMS can fully test B-Mesogenesis.

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“…This phase is the main quantity controlling the CP violation in the system. In the SM, where the off-diagonal elements of the oscillation Hamiltonian are generated by box diagrams, nonzero φ q M and φ q Γ arise from the phase in the CKM matrix [45][46][47][48].…”

Section: The Semileptonic Asymmetriesmentioning

confidence: 99%

A supersymmetric theory of baryogenesis and sterile sneutrino dark matter from B mesons

Alonso-Álvarez¹,

Elor

Nelson

et al. 2020

J. High Energ. Phys.

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Low-scale baryogenesis and dark matter generation can occur via the production of neutral B mesons at MeV temperatures in the early Universe, which undergo CP-violating oscillations and subsequently decay into a dark sector. In this work, we discuss the consequences of realizing this mechanism in a supersymmetric model with an unbroken U (1) R symmetry which is identified with baryon number. B mesons decay into a dark sector through a baryon number conserving operator mediated by TeV scale squarks and a GeV scale Dirac bino. The dark sector particles can be identified with sterile neutrinos and their superpartners in a type-I seesaw framework for neutrino masses. The sterile sneutrinos are sufficiently long lived and constitute the dark matter. The produced matter-antimatter asymmetry is directly related to observables measurable at B factories and hadron colliders, the most relevant of which are the semileptonic-leptonic asymmetries in neutral B meson systems and the inclusive branching fraction of B mesons into hadrons and missing energy. We discuss model independent constraints on these experimental observables before quoting predictions made in the supersymmetric context. Constraints from astrophysics, neutrino physics and flavor observables are studied, as are potential LHC signals with a focus on novel long lived particle searches which are directly linked to properties of the dark sector.

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Mixing asymmetries inBmeson systems, the D0 like-sign dimuon asymmetry, and generic new physics

Cited by 5 publications

References 73 publications

Baryogenesis and dark matter from B mesons

Baryogenesis and dark matter from B mesons

Collider Signals of Baryogenesis and Dark Matter from $B$ Mesons: A Roadmap to Discovery

A supersymmetric theory of baryogenesis and sterile sneutrino dark matter from B mesons

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