Lifetime Difference and CP-Violating Phase in the B{sub s}{sup 0} System
- Joint Institute for Nuclear Research, Dubna (Russian Federation)
- University of Oklahoma, Norman, Oklahoma 73019 (United States)
- Michigan State University, East Lansing, Michigan 48824 (United States)
From an analysis of the decay B{sub s}{sup 0}{yields}J/{psi}{phi}, we obtain the width difference between the light and heavy mass eigenstates {delta}{gamma}{identical_to}({gamma}{sub L}-{gamma}{sub H})=0.17{+-}0.09(stat){+-}0.02(syst) ps{sup -1} and the CP-violating phase {phi}{sub s}=-0.79{+-}0.56(stat){sub -0.01}{sup +0.14}(syst). Under the hypothesis of no CP violation ({phi}{sub s}{identical_to}0), we obtain 1/{gamma}= {tau}(B{sub s}{sup 0})=1.52{+-}0.08(stat){sub -0.03}{sup +0.01}(syst) ps and {delta}{gamma}=0.12{sub -0.10}{sup +0.08}(stat){+-}0.02(syst) ps{sup -1}. The data sample corresponds to an integrated luminosity of about 1.1 fb{sup -1} accumulated with the D0 detector at the Fermilab Tevatron collider. This is the first direct measurement of the CP-violating mixing phase in the B{sub s}{sup 0} system.
- OSTI ID:
- 20951116
- Journal Information:
- Physical Review Letters, Vol. 98, Issue 12; Other Information: DOI: 10.1103/PhysRevLett.98.121801; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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