SUSY R-parity violating contributions to the width differences forD−D̄ andB_d,s−B̄_d,ssystems

Abstract

We study R-parity violating contributions to the mixing parameter y forsystems. We first obtain general expressions for new physics contributions to y from effective four fermion operators. We then use them to study R-parity contributions. We find that R-parity violating contributions to D 0 −D 0 mixing, and B 0 d −B 0 d to be small. There may be sizable contribution to B 0 s −B 0 s mixing. We also obtain some interesting bounds on R-parity violating parameters using known Standard Model predictions and experimental data.

Decays $D^+_{(s)}\to \pi(K)^{+}\ell^+\ell^-$ and D0→ℓ+ℓ- in the MSSM with and without R-parity

“…[13][14][15][16][17]), one neglects the difference between λ ′ andλ ′ , based on the fact that diagonal elements of the CKM matrix dominate over nondiagonal ones.…”

Lifetime difference in $D^0$-${\bar D}^0$ mixing within R-parity-violating SUSY

“…. This term is of the primary importance here: the second term in (1.2) is proven to be < ∼ 10 −4 in the most popular SM extensions [4,10,13] and, hence, negligible in general.…”

“…We revisit the problem of the NP contribution to y D and provide constraints on R-parity-violating supersymmetric (SUSY) models as a primary example. It has been recently argued in [13] that within / R-SUSY models, new physics contribution to y D is rather small, mainly because of stringent constraints on the relevant pair products of RPV coupling constants. However, this result has been derived neglecting the transformation of these couplings from the weak isospin basis to the quark mass basis.…”

Continuous Advances in QCD 2008

“…Refs. [24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42]. TeVatron is continuing to take data and we will get more precise data from the upcomming experiments at LHC 43 or possibly at a SuperB-factory 44 running also at the Υ(5s)-resonance.…”