EPJ

2023 Impact factor 4.2
EPJ C - Particles and Fields
Particles and Fields
Eur. Phys. J. C 5, 283-286
DOI 10.1007/s100529800854

Two-particle correlations and $B^0\overline{B}^0$ mixing

G.V. Dass1 - K.V.L. Sarma2

1 Department of Physics, Indian Institute of Technology, Powai, Mumbai, 400 076 India (e-mail: guruv@niharika.phy.iitb.ernet.in, Fax: 091 22 578 3480)
2 Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai, 400 005 India

Received: 24 November 1997 / Published online: 10 March 1998

Abstract
We study the EPR correlation implied by the entangled wavefunction of the $B^0\overline{B}^0$pair created by the $\Upsilon(4S)$ resonance. The analysis uses the basis provided by the mass eigenstates B1,B2 rather than the flavour states $B^0,\overline{B}^0$. Data on the inclusive dilepton charge ratio are close to the expectation of quantum mechanics, but nearly 8 standard deviations away from that of complete decoherence. Our results are compared with those obtained in the $(B^0,\overline{B}^0)$ basis.

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