New physics contributions to $\bar{B}^0_{(s)}\to D^{(*)}_{(s)}\,K/\pi$

Iguro, Syuhei

doi:10.22323/1.411.0125

Cited by 2 publications

(3 citation statements)

References 12 publications

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“…In [19, 20], a model-independent strategy has been presented, showing that the data can be accommodated with NP contributions at the level of 30% of the SM amplitudes. We note that model-dependent studies have also been discussed in [16][17][18].…”

Section: The Ut Angle γmentioning

confidence: 99%

“…In most SM theories, the NP contributions are strongly suppressed in these topologies, and can thus still be neglected. Nonetheless, it remains possible for NP effects to be present in these decays [14][15][16][17][18]. Therefore it is important to carefully compare the results from individual measurements, now and in the future, and in particular when including them in experimental averages.…”

Section: Introductionmentioning

confidence: 99%

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New physics in B_q ⁰– B¯q0 mixing: present challenges, prospects, and implications for Bq0⃗μ+μ−

Bruyn

Fleischer²,

Malami³

et al. 2023

J. Phys. G: Nucl. Part. Phys.

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The phenomenon of Bq 0B q 0 mixing (q=d,s) provides a sensitive probe for physics beyond the Standard Model. We explore the corresponding space for New Physics left through the current data, having a careful look at analyses of the Unitarity Triangle that are needed for the Standard Model predictions of the Bq mixing parameters. In particular, we explore the impact of tensions between inclusive and exclusive determinations of the CKM matrix elements |Vub| and |Vcb|. Moreover, we focus on the angle γ of the Unitarity Triangle, comparing measurements from B→DK and B→ππ, ρπ, ρρ decays, where the latter are typically interpreted in terms of the angle α. We discuss various scenarios and present the corresponding state-of-the-art constraints on the New Physics parameters of Bq 0B q 0 mixing. We point out that these results have an interesting application in the analysis of rare Bq 0→μ+μ- decays, allowing us to minimise the impact of CKM parameters in the search for New Physics. In view of the high-precision era, we make future projections. Interestingly, we find that for the extraction of the New Physics parameters in the Bd system the determination of the apex of the Unitarity Triangle results in a key limiting factor. By contrast, the corresponding impact is negligible for the Bs system, making it a promising candidate to reveal sources of New Physics.

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Section: The Ut Angle γmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

New physics in B_q ⁰– B¯q0 mixing: present challenges, prospects, and implications for Bq0⃗μ+μ−

Bruyn

Fleischer²,

Malami³

et al. 2023

J. Phys. G: Nucl. Part. Phys.

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“…The model can be tested by the current and future measurements of various flavor experiments like Kaon rare decays, in addition to high energy collider experiments as well as gravitational wave observations. For example, top-charm mixing and its CP violating phase are important parameters to test the model via the signals at direct search experiments [52][53][54][55][56][57][58][59] and various transition processes of K mesons and B mesons [60][61][62][63][64][65][66][67][68][69]. In particular, they would be testable via the golden modes K → πνν [70,71] at KOTO experiment at J-PARK [66,72] and NA62 experiment at the CERN SPS [67,68].…”

Section: Introductionmentioning

confidence: 99%

Electroweak baryogenesis via top-charm mixing

Kanemura¹,

Mura²

2023

Preprint

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We investigate a scenario of electroweak baryogenesis in the two Higgs doublet model with quark flavor mixing. In general, off-diagonal components of quark Yukawa interactions with additional Higgs bosons are strongly constrained by the data for flavor changing neutral currents. However, top-charm quark mixing is not the case, so that a large off-diagonal element can be taken, which can contribute to generating baryon asymmetry of the universe. It turns out that CP violating phases of the off-diagonal element in the source term in the Boltzmann equation are eliminated by the rephasing. This result is somewhat different from previous works on electroweak baryogenesis by flavor off-diagonal Yukawa couplings. Instead, we find that the absolute value of the top-charm off-diagonal element enhances CP violating phases in the Higgs potential, by which sufficient amount of the baryon number can be generated to explain the observed baryon asymmetry of the universe. We find that such a scenario is viable under the current experimental data. The model can be tested by the current and future measurements of various flavor experiments like Kaon rare decays, in addition to high energy collider experiments as well as gravitational wave observations. Characteristic predictions of our model would be deviations in Kaon rare decays. Branching ratios of K + → π + νν and K L → π 0 νν can deviate by the order of 10% and 1%, respectively, which may be tested at future Kaon experiments such as NA62 and KOTO step-2.

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New physics contributions to $\bar{B}^0_{(s)}\to D^{(*)}_{(s)}\,K/\pi$

Cited by 2 publications

References 12 publications

New physics in B_q ⁰– B¯q0 mixing: present challenges, prospects, and implications for Bq0⃗μ+μ−

New physics in B_q ⁰– B¯q0 mixing: present challenges, prospects, and implications for Bq0⃗μ+μ−

Electroweak baryogenesis via top-charm mixing

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New physics contributions to $\bar{B}^0_{(s)}\to D^{(*)}_{(s)}\,K/\pi$

Cited by 2 publications

References 12 publications

New physics in B q 0– B¯q0 mixing: present challenges, prospects, and implications for Bq0⃗μ+μ−

New physics in B q 0– B¯q0 mixing: present challenges, prospects, and implications for Bq0⃗μ+μ−

Electroweak baryogenesis via top-charm mixing

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Product

Resources

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New physics in B_q ⁰– B¯q0 mixing: present challenges, prospects, and implications for Bq0⃗μ+μ−

New physics in B_q ⁰– B¯q0 mixing: present challenges, prospects, and implications for Bq0⃗μ+μ−