Dispersive and Absorptive CP Violation in $D^0- \overline{D^0}$ Mixing

Kagan, Alexander L.; Silvestrini, Luca

doi:10.48550/arxiv.2001.07207

Cited by 5 publications

(8 citation statements)

References 40 publications

(103 reference statements)

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“…A more stringent bound is obtained for CP violating axionic contributions from an experimental bound on the D − D mixing phase [142]…”

Section: B Heavy-meson Mixingmentioning

confidence: 99%

“…At the end of LHCb Upgrade II the experimental constraints are expected to reach the parametric sizes of the SM contributions to the two mixing phases, φ M 2 ∼ φ Γ 2 ∼ 10 −3 . For the projections of future sensitivities we thus still use the projected 90% CL bound on |φ M 2 | < 2.0 • 10 −3 (approximate universality fit projection in [142]), assuming that the axion saturates the upper bound, i.e., we assume no cancellations with the poorly known SM contribution. This gives for the expected future sensitivities…”

Section: B Heavy-meson Mixingmentioning

confidence: 99%

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Quark Flavor Phenomenology of the QCD Axion

Camalich,

Pospelov,

Vuong

et al. 2020

Preprint

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Axion models with generation-dependent Peccei-Quinn charges can lead to flavor-changing neutral currents, thus motivating QCD axion searches at precision flavor experiments. We rigorously derive limits on the most general effective flavor-violating couplings from current measurements and assess their discovery potential. For two-body decays we use available experimental data to derive limits on q → q a decay rates for all flavor transitions. Axion contributions to neutral-meson mixing are calculated in a systematic way using chiral perturbation theory and operator product expansion. We also discuss in detail baryonic decays and three-body meson decays, which can lead to the best search strategies for some of the couplings. For instance, a strong limit on the Λ → na transition can be derived from the supernova SN 1987A. In the near future, dedicated searches for q → q a decays at ongoing experiments could potentially test Peccei-Quinn breaking scales up to 10 12 GeV at NA62 or KOTO, and up to 10 9 GeV at Belle II or BES III.

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“…A more stringent bound is obtained for CP violating axionic contributions from an experimental bound on the D − D mixing phase [142]…”

Section: B Heavy-meson Mixingmentioning

confidence: 99%

Section: B Heavy-meson Mixingmentioning

confidence: 99%

Quark Flavor Phenomenology of the QCD Axion

Camalich,

Pospelov,

Vuong

et al. 2020

Preprint

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“…In model 4, F di = 0 and U NP break = 0, that is, U-spin breaking is SM-like. On the other hand, for F d2 − F d1 ∼ O (10) as in model 2, large U-spin breaking effects can arise and would be discernible with future sensitivities for A CP (K + K − ) and A CP (π + π − ) shown in TABLE IV. For models with F Q1 = F Q2 = 0 we obtain for the pure NP U-spin breaking from Eq.…”

Section: Patterns In Hadronic Decaysmentioning

confidence: 88%

“…For recent works, see Refs. [3][4][5][6][7][8][9][10][11][12]. Turning this around, the study of patterns using different sectors can hence disfavor or support a particular ∆A CP interpretation, and vice versa.…”

Section: Introductionmentioning

confidence: 99%

Exploiting CP-asymmetries in rare charm decays

Bause,

Gisbert,

Golz

et al. 2020

Preprint

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We analyze patterns from CP-violating new physics (NP) in hadronic and semileptonic rare charm |∆c| = |∆u| = 1 transitions. Observation of direct CP-violation in hadronic decays, as in ∆ACP, provides opportunities for c → u + − , = e, µ transitions, and vice versa. For the concrete case of flavorful, anomaly-free Z -models a NP-interpretation of ∆ACP suggests measurable CP-asymmetries in semileptonic decays such as D → π + − or D → ππ + − . Conversely, an observation of CP-violation in c → u e + e − or c → u µ + µ − decays supports a NP-interpretation of ∆ACP. Flavorful U (1) -extensions provide explicit U-spin and isospin breaking which can be probed in patterns of hadronic decays of charm mesons. We work out signatures for CP-asymmetries in D

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“…The point is that different observables arise at different orders of SU (3) breaking, and while we cannot calculate how large this breaking is in specific matrix elements, it is typically of order 20%. Thus, by exploiting relations that hold to higher order in SU (3) breaking, we can derive a pattern that can be used to probe the SM [33,34].…”

Section: Charm Physicsmentioning

confidence: 99%

Theoretical challenges for flavor physics

Grossman¹,

Ligeti²

2021

Preprint

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We discuss some highlights of the FCC-ee flavor physics program. It will help to explore various aspects of flavor physics: to test precision calculations, to probe nonperturbative QCD methods, and to increase the sensitivity to physics beyond the standard model. In some areas, FCC-ee will do much better than current and near-future experiments. We briefly discuss several probes that can be relevant for maximizing the gain from the FCC-ee flavor program.

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Dispersive and Absorptive CP Violation in $D^0- \overline{D^0}$ Mixing

Cited by 5 publications

References 40 publications

Quark Flavor Phenomenology of the QCD Axion

Quark Flavor Phenomenology of the QCD Axion

Exploiting CP-asymmetries in rare charm decays

Theoretical challenges for flavor physics

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