Pion leptonic decays and supersymmetry

作者：Ramsey Musolf Michael J^*; Su Shufang; Tulin Sean

来源：Physical Review D - Particles, Fields, Gravitation and Cosmology, 2007, 76(9): 095017.

DOI：10.1103/PhysRevD.76.095017

We compute supersymmetric contributions to pion leptonic (pi(l2)) decays in the minimal supersymmetric standard model (MSSM). When R-parity is conserved, the largest contributions to the ratio R(e/mu)equivalent to Gamma[pi(+)-> e(+)nu(e)(gamma)]/Gamma[pi(+)->mu(+)nu(mu)(gamma)] arise from one-loop (V-A)circle times(V-A) corrections. These contributions can be potentially as large as the sensitivities of upcoming experiments; if measured, they would imply significant bounds on the chargino and slepton sectors complementary to current collider limits. We also analyze R-parity-violating interactions, which may produce a detectable deviation in R(e/mu) while remaining consistent with all other precision observables.

• 出版日期2007-11