ISSN:
1434-6052
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract. We present the results of a quenched lattice calculation of the operator matrix elements relevant for predicting the $B_s$ width difference. Our main result is $\left(\Delta\Gamma_{B_s}/\Gamma_{B_s}\right)= (4.7 \pm 1.5 \pm 1.6) \times 10^{-2}$ , obtained from the ratio of matrix elements ${\cal R}(m_b)= \langle \bar B_s^0\vert Q_{S}\vert B_s^0\rangle/$ $\langle \bar B_s^0\vert Q_{L}\vert B_s^0\rangle =-0.93(3)^{+0.00}_{-0.01}$ . ${\cal R}(m_b)$ was evaluated from the two relevant B parameters $B_{S}^{\overline{\mathrm{MS}}} (m_b) = 0.86(2)^{+0.02}_{-0.03}$ and $B_{B_s}^{\overline{\mathrm{MS}}} (m_b) =0.91(3)^{+0.00}_{-0.06}$ , which we computed in our simulation.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s100520000502
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