THE ISGUR-WISE FUNCTION FROM THE LATTICE

被引：47

作者：

BOOTH, SP ^{[1
]}

BOWLER, KC ^{[1
]}

HAZEL, NM ^{[1
]}

HENTY, DS ^{[1
]}

HOEBER, H ^{[1
]}

KENWAY, RD ^{[1
]}

RICHARDS, DG ^{[1
]}

SHANAHAN, HP ^{[1
]}

SIMONE, JN ^{[1
]}

SIMPSON, AD ^{[1
]}

LELLOUCH, L ^{[1
]}

NIEVES, J ^{[1
]}

SACHRAJDA, CT ^{[1
]}

WITTIG, H ^{[1
]}

机构：

[1] UNIV SOUTHAMPTON, DEPT PHYS, SOUTHAMPTON SO9 5NH, HANTS, ENGLAND

来源：

PHYSICAL REVIEW LETTERS | 1994年 / 72卷 / 04期

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1103/PhysRevLett.72.462

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We calculate the Isgur-Wise function by measuring the elastic scattering amplitude of a D meson in the quenched approximation on a 24(3) x 48 lattice at beta = 6.2, using an O(a)-improved fermion action. Fitting the resulting chirally extrapolated Isgur-Wise function to Stech's relativistic-oscillator parametrization, we obtain a slope parameter rho2 = 1.2(-3)+7. We then use this result, in conjunction with heavy-quark symmetry, to extract V(cb) from the measured BBAR --> D*lnuBAR differential decay width. We find \V(cb)] square-root tau(B)/(1.48 ps) = 0.038(-2-3)+2+8, where the first error is due to experimental uncertainties, while the second is due to the uncertainty in our lattice determination of rho2.

引用

页码：462 / 465

页数：4

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