Gluino-mediated electroweak penguin with flavor-violating trilinear couplings

Endo, Motoi; Goto, Toru; Kitahara, Teppei; Mishima, Satoshi; Ueda, Daiki; Yamamoto, Kei

doi:10.1007/jhep04(2018)019

Cited by 40 publications

(38 citation statements)

References 88 publications

(148 reference statements)

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“…Within the MSSM there are four distinct amplitudes able to generate sizable contributions to K / K : isospin-breaking gluino-squark box diagrams [52] (also known as Trojan penguins [53]), chargino-squark box diagrams [54] and chargino-mediated [55,56] as well as gluino-mediated [57] Z-penguin diagrams (relevant to scenarios with sizeable trilinear terms).…”

Section: Flavour-changing Observablesmentioning

confidence: 99%

Exploring the flavour structure of the high-scale MSSM

Isidori

Trifinopoulos

2020

Eur. Phys. J. C

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We analyse the sensitivity of quark flavour-changing observables to the MSSM, in a regime of heavy superpartner masses. We analyse four distinct and motivated frameworks characterising the structure of the soft-breaking terms by means of approximate flavour symmetries. We show that a set of six low-energy observables with realistic chances of improvement in the near future, namely ∆M s,d , K , K / K , B(K → πνν), and the phase of D-D mixing, could play a very important role in charactering these frameworks in a regime of superpartner masses up to O(100) TeV. We show that these observables remain very interesting even in a long-term perspective, i.e. even taking into account the direct mass reach of the most ambitious future high-energy colliders. *

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Section: Flavour-changing Observablesmentioning

confidence: 99%

Exploring the flavour structure of the high-scale MSSM

Isidori

Trifinopoulos

2020

Eur. Phys. J. C

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“…They could be a signal to test the scenario. In the MSSM, such a scenario is also realized when the off-diagonal components of the trilinear SUSY-breaking couplings are large [33][34][35].…”

Section: Z-penguin Dominated (Modified Z-coupling) Scenariomentioning

confidence: 99%

“…Such interference contributions between the NP and the SM have been overlooked in the literature. References [35][36][37] have revisited the modified Z-coupling scenario including the interference contributions, and found the parameter regions allowed by the indirect CP violation change significantly.…”

Section: Z-penguin Dominated (Modified Z-coupling) Scenariomentioning

confidence: 99%

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Standard Model and New physics for ε^′_k/ε_k

Kitahara

2018

EPJ Web Conf.

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Abstract. The first result of the lattice simulation and improved perturbative calculations have pointed to a discrepancy between data on ε ′ K /ε K and the standard-model (SM) prediction. Several new physics (NP) models can explain this discrepancy, and such NP models are likely to predict deviations of B(K → πνν) from the SM predictions, which can be probed precisely in the near future by NA62 and KOTO experiments. We present correlations between ε ′ K /ε K and B(K → πνν) in two types of NP scenarios: a box dominated scenario and a Z-penguin dominated one. It is shown that different correlations are predicted and the future precision measurements of K → πνν can distinguish both scenarios.

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“…They could be a signal to test the scenario. In the MSSM, such a scenario is also realized when the off-diagonal components of the trilinear SUSY-breaking couplings are large [29][30][31].…”

Section: Z-penguin Dominated (Modified Z-coupling) Scenariomentioning

confidence: 99%

Recent developments on direct CP violation in the kaon system and connection to $K\to \pi \nu \overline{\nu}$ measurements

Kitahara¹

2018

Proceedings of XIV International Conference on Heavy Quarks and Leptons — PoS(HQL2018)

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The first lattice result from the RBC and UKQCD Collaborations and improved perturbative calculations of ε K /ε K have implied that the Standard-Model (SM) expectation deviates from measured values at the 2.8 σ level. Since ε K /ε K comes from CP-violating FCNC and is significantly suppressed in the SM, the discrepancy can be explained easily in several new physics (NP) models. In this contribution, it is shown that correlations with the other rare decays, especially K → πνν and K S → µ + µ − , are crucial for discrimination of the NP models. These channels can be probed precisely in the future by the NA62 and KOTO experiments for K → πνν and LHCb experiment for K S → µ + µ − .

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Gluino-mediated electroweak penguin with flavor-violating trilinear couplings

Cited by 40 publications

References 88 publications

Exploring the flavour structure of the high-scale MSSM

Exploring the flavour structure of the high-scale MSSM

Standard Model and New physics for ε^′_k/ε_k

Recent developments on direct CP violation in the kaon system and connection to $K\to \pi \nu \overline{\nu}$ measurements

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Gluino-mediated electroweak penguin with flavor-violating trilinear couplings

Cited by 40 publications

References 88 publications

Exploring the flavour structure of the high-scale MSSM

Exploring the flavour structure of the high-scale MSSM

Standard Model and New physics for ε′k/εk

Recent developments on direct CP violation in the kaon system and connection to $K\to \pi \nu \overline{\nu}$ measurements

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Product

Resources

About

Standard Model and New physics for ε^′_k/ε_k