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APS » Journals » Phys. Rev. Lett. » Volume 95 » Issue 22
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Phys. Rev. Lett. 95, 221804 (2005) [4 pages]

Effect of Penguin Operators in the B0→J/ψK0 CP Asymmetry

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M. Ciuchini1, M. Pierini2, and L. Silvestrini3,*
1Dipartimento di Fisica, Università “La Sapienza” and INFN, Sezione di Roma, P.le A. Moro, I-00185 Rome, Italy
2Department of Physics, University of Wisconsin, Madison, Wisconsin 53706, USA
3Dipartimento di Fisica, Università di Roma Tre and INFN, Sezione di Roma III, Via della Vasca Navale 84, I-00146 Roma, Italy

Received 27 July 2005; published 23 November 2005

Performing a fit to the available experimental data, we quantify the effect of long-distance contributions from penguin contractions in B0→J/ψK0 decays. We estimate the deviation of the measured SCP term of the time-dependent CP asymmetry from sin⁡2β induced by these contributions and by the penguin operators. We find ΔS≡SCP(J/ψK)-sin⁡2β=0.000±0.012 ([-0.025,0.024]@95% probability), an uncertainty much larger than previous estimates and comparable to the present systematic error quoted by the experiments at the B factories.

© 2005 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.95.221804
DOI:
10.1103/PhysRevLett.95.221804
PACS:
13.25.Hw, 12.15.Hh

*Also at: Physik-Department, Technische Universität München, D-85748 Garching, Germany.

 
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