We report on a search for the flavor-changing neutral-current decay D(0) -> mu(+)mu(-) in p (p) over bar collisions at root s = 1.96 TeV using 360 pb(-1) of integrated luminosity collected by the CDF II detector at the Fermilab Tevatron collider. A displaced vertex trigger selects long-lived D(0) candidates in the mu(+)mu(-), pi(+)pi(-), and K(-)pi(+) decay modes. We use the Cabibbo-favored D(0) -> K(-)pi(+) channel to optimize the selection criteria in an unbiased manner, and the kinematically similar D(0) -> pi(+)pi(-) channel for normalization. We set an upper limit on the branching fraction B(D(0) -> mu(+)mu(-)) < 2.1 X 10(-7) (3.0 X 10(-7)) at the 90% (95%) confidence level.
Updated search for the flavor-changing neutral-current decay D(0) -> mu(+)mu(-) in p(p)over-bar collisions at root s=1.96 TeV RID G-1087-2011 RID E-4473-2011
Ruffini F;
2010-01-01
Abstract
We report on a search for the flavor-changing neutral-current decay D(0) -> mu(+)mu(-) in p (p) over bar collisions at root s = 1.96 TeV using 360 pb(-1) of integrated luminosity collected by the CDF II detector at the Fermilab Tevatron collider. A displaced vertex trigger selects long-lived D(0) candidates in the mu(+)mu(-), pi(+)pi(-), and K(-)pi(+) decay modes. We use the Cabibbo-favored D(0) -> K(-)pi(+) channel to optimize the selection criteria in an unbiased manner, and the kinematically similar D(0) -> pi(+)pi(-) channel for normalization. We set an upper limit on the branching fraction B(D(0) -> mu(+)mu(-)) < 2.1 X 10(-7) (3.0 X 10(-7)) at the 90% (95%) confidence level.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
