A Theoretical Prediction of the Bs-Meson Lifetime Difference
High Energy Physics - Phenomenology
2011-09-13 v1 High Energy Physics - Lattice
Abstract
We present the results of a quenched lattice calculation of the operator matrix elements relevant for predicting the Bs width difference. Our main result is (\Delta\Gamma_Bs/\Gamma_Bs)= (4.7 +/- 1.5 +/- 1.6) 10^(-2), obtained from the ratio of matrix elements, R(m_b)=<\bar B_s^0|Q_S|B_s^0>/<\bar B_s^0|Q_L|B_s^0>=-0.93(3)^(+0.00)_(-0.01). R(m_b) was evaluated from the two relevant B-parameters, B_S^{MSbar}(m_b)=0.86(2)^(+0.02)_(-0.03) and B_Bs^{MSbar}(m_b) = 0.91(3)^(+0.00)_(-0.06), which we computed in our simulation.
Keywords
Cite
@article{arxiv.hep-ph/0006135,
title = {A Theoretical Prediction of the Bs-Meson Lifetime Difference},
author = {D. Becirevic and D. Meloni and A. Retico and V. Gimenez and V. Lubicz and G. Martinelli},
journal= {arXiv preprint arXiv:hep-ph/0006135},
year = {2011}
}
Comments
21 pages, 7 PostScript figures