Measurement of K+=>pi+, nu, nubar at Fermilab

Aula Bruno Touschek (Laboratori Nazionali di Frascati, Via Enrico Fermi 40, Frascati)

Aula Bruno Touschek

Laboratori Nazionali di Frascati, Via Enrico Fermi 40, Frascati

Via Enrico Fermi 40 00044 Frascati

The branching ratio of the rare decay K+=>pi+,nu,nubar is sensitive to most new physics models that extend the Standard Model and solve its considerable problems. As the SM prediction for the branching ratio is theoretically robust at the 5% level, a measurement with comparable precision offers unique discovery potential for new physics. The proposed experiment P996 at Fermilab extends the successful program of Brookhaven experiments E787 and E949 that observed the rare decay using a stopped kaon beam. Coupled with a high-duty-factor beam provided by operation of Tevatron as a "Stretcher", P996 would be capable of a precision measurement the K+=>pi+,nu,nubar branching ratio.

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