Probing SUSY effects in K0 S → μ+μ−

Abstract

We explore supersymmetric contributions to the decay K 0 Predictions for the CP asymmetry in K 0 → µ + µ − decays in the context of MSSM are also given, and can be up to eight times bigger than in the SM.

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

“…Therefore, one can also distinguish the NP scenarios using the correlation with K S → µ + µ − . Such a correlation has been investigated in the box dominated scenario (with large tan β ) [36] and the modified Z-coupling scenario [31,35]. toi Endo, Toru Goto, Miriam Lucio Martinez, Diego Martinez Santos, Satoshi Mishima, Ulrich Nierste, Isabel Suarez Fernandez, Paul Tremper, Daiki Ueda, and Kei Yamamoto for fruitful collaborations on the presented work.…”

Prospects for measurements with strange hadrons at LHCb

“…, when compared with the current experimental upper limit [3] B(K 0 S → µ + µ − ) < 8 × 10 −10 at 90% CL , leaves room for small BSM contributions to interfere and compete with the SM rate. This is shown to be the case in leptoquark (LQ) models [31,32] as well as in the Minimal Supersymmetric Standard Model (MSSM) [33]. In the LQ case, the enhancements can reach as high as the current experimental bound, while within the MSSM, B(K 0 S → µ + µ − ) can adopt values anywhere in the range [0.…”

“…, the latter being an important channel for BSM searches, such as extra dimensions [35]. Currently, the only existing measurement comes from the NA48 experiment [36], [33], in an MSSM scenario with universal gaugino masses. The cyan dots correspond to predictions with A µ Lγγ > 0 and the orange crosses to predictions using A µ Lγγ < 0.…”

A strange program for LHCb

“…Therefore, small BSM contributions and BSM/SM interferences can sizably modify the branching fraction. This has been proven to be the case in leptoquark models [7] [8] as well as supersymmetric models [9], despite of other experimental constraints.…”