Electromagnetic penguin operators and direct CP violation inK→πell+ell− | Zendy

Giancarlo D’Ambrosio | Zendy; Dao-Neng Gao | Zendy

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Electromagnetic penguin operators and direct CP violation inK→πell⁺ell⁻

Author(s) -

Giancarlo D’Ambrosio,

Dao-Neng Gao

Publication year - 2002

Publication title -

journal of high energy physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.998

H-Index - 261

eISSN - 1126-6708

pISSN - 1029-8479

DOI - 10.1088/1126-6708/2002/07/068

Subject(s) - physics , cp violation , asymmetry , particle physics , quark , lattice (music) , dimension (graph theory) , quark model , charge (physics) , physics beyond the standard model , combinatorics , mathematics , acoustics , quarkonium

Supersymmetric extensions of the Standard Model predict a large enhancementof the Wilson coefficients of the dimension-five electromagnetic penguinoperators affecting the direct CP violation in K_L --> pi^0 e^+ e^- and thecharge asymmetry in K^\pm --> pi^\pm l^+ l^-. Here we compute the relevant matrix elements in the chiral quark model andcompare these with the ones given by lattice calculationsComment: 12 pages, JHEP style, gluonic corrections to B_T adde

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