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Lattice calculation of D- and B-meson semileptonic decays, using the clover action at β = 6.0 on APE

N. Cabibbo, F. Rapuano, A. Vladikas, S. Cabasino, G. Martinelli, G.M. Todesco, V. Lubicz, M. Crisafulli, C. Battista, P.S. Paolucci, R. Sarno, M. Torelli, P. Vicini, A. Bartoloni, N. Stella, E. Panizzi, Chris Allton Orcid Logo

Physics Letters B, Volume: 345, Issue: 4, Pages: 513 - 523

Swansea University Author: Chris Allton Orcid Logo

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DOI (Published version): 10.1016/0370-2693(94)01629-Q

Abstract

We present the results of a high statistics lattice calculation of hadronic form factors relevant for $D-$ and $B-$meson semi-leptonic decays into light pseudoscalar and vector mesons. The results have been obtained by averaging over 170 gauge field configurations, generated in the quenched approxim...

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Published in: Physics Letters B
ISSN: 03702693
Published: 1995
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URI: https://cronfa.swan.ac.uk/Record/cronfa28465
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spelling 2016-08-08T12:12:09.1490704 v2 28465 2016-06-02 Lattice calculation of D- and B-meson semileptonic decays, using the clover action at β = 6.0 on APE de706a260fa1e1e47430693e135f41c7 0000-0003-0795-124X Chris Allton Chris Allton true false 2016-06-02 SPH We present the results of a high statistics lattice calculation of hadronic form factors relevant for $D-$ and $B-$meson semi-leptonic decays into light pseudoscalar and vector mesons. The results have been obtained by averaging over 170 gauge field configurations, generated in the quenched approximation, at $\beta=6.0$, on a $18~3 \times 64$ lattice, using the $O(a)$-improved SW-Clover action.From the study of the matrix element $<K~-\vert J_\mu \vert D~0>$, we obtain $f_+ (0)=0.78\pm 0.08$ and from the matrix element $<\bar K~{* 0}\vert J_\mu \vert D~+>$ we obtain $V(0)=1.08\pm 0.22$, $A_1(0)=0.67\pm 0.11$ and $A_2(0)=0.49\pm 0.34$. We also obtain the ratios $V(0)/A_1(0)=1.6\pm 0.3$ and $A_2(0)/A_1(0)= 0.7\pm 0.4$. Our predictions for the different form factors are in good agreement with the experimental data, although, in the case of $A_2(0)$, the errors are still too large to draw any firm conclusion. With the help of the Heavy Quark Effective Theory (HQET) we have also extrapolated the lattice results to $B$-meson decays. The form factors follow a behaviour compatible with the HQET predictions. Our results are in agreement with a previous lattice calculation, performed at $\beta=6.4$, using the standard Wilson action. Journal Article Physics Letters B 345 4 513 523 03702693 31 12 1995 1995-12-31 10.1016/0370-2693(94)01629-Q http://inspirehep.net/record/379658 COLLEGE NANME Physics COLLEGE CODE SPH Swansea University 2016-08-08T12:12:09.1490704 2016-06-02T15:06:22.8461719 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Physics N. Cabibbo 1 F. Rapuano 2 A. Vladikas 3 S. Cabasino 4 G. Martinelli 5 G.M. Todesco 6 V. Lubicz 7 M. Crisafulli 8 C. Battista 9 P.S. Paolucci 10 R. Sarno 11 M. Torelli 12 P. Vicini 13 A. Bartoloni 14 N. Stella 15 E. Panizzi 16 Chris Allton 0000-0003-0795-124X 17
title Lattice calculation of D- and B-meson semileptonic decays, using the clover action at β = 6.0 on APE
spellingShingle Lattice calculation of D- and B-meson semileptonic decays, using the clover action at β = 6.0 on APE
Chris Allton
title_short Lattice calculation of D- and B-meson semileptonic decays, using the clover action at β = 6.0 on APE
title_full Lattice calculation of D- and B-meson semileptonic decays, using the clover action at β = 6.0 on APE
title_fullStr Lattice calculation of D- and B-meson semileptonic decays, using the clover action at β = 6.0 on APE
title_full_unstemmed Lattice calculation of D- and B-meson semileptonic decays, using the clover action at β = 6.0 on APE
title_sort Lattice calculation of D- and B-meson semileptonic decays, using the clover action at β = 6.0 on APE
author_id_str_mv de706a260fa1e1e47430693e135f41c7
author_id_fullname_str_mv de706a260fa1e1e47430693e135f41c7_***_Chris Allton
author Chris Allton
author2 N. Cabibbo
F. Rapuano
A. Vladikas
S. Cabasino
G. Martinelli
G.M. Todesco
V. Lubicz
M. Crisafulli
C. Battista
P.S. Paolucci
R. Sarno
M. Torelli
P. Vicini
A. Bartoloni
N. Stella
E. Panizzi
Chris Allton
format Journal article
container_title Physics Letters B
container_volume 345
container_issue 4
container_start_page 513
publishDate 1995
institution Swansea University
issn 03702693
doi_str_mv 10.1016/0370-2693(94)01629-Q
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Biosciences, Geography and Physics - Physics{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Physics
url http://inspirehep.net/record/379658
document_store_str 0
active_str 0
description We present the results of a high statistics lattice calculation of hadronic form factors relevant for $D-$ and $B-$meson semi-leptonic decays into light pseudoscalar and vector mesons. The results have been obtained by averaging over 170 gauge field configurations, generated in the quenched approximation, at $\beta=6.0$, on a $18~3 \times 64$ lattice, using the $O(a)$-improved SW-Clover action.From the study of the matrix element $<K~-\vert J_\mu \vert D~0>$, we obtain $f_+ (0)=0.78\pm 0.08$ and from the matrix element $<\bar K~{* 0}\vert J_\mu \vert D~+>$ we obtain $V(0)=1.08\pm 0.22$, $A_1(0)=0.67\pm 0.11$ and $A_2(0)=0.49\pm 0.34$. We also obtain the ratios $V(0)/A_1(0)=1.6\pm 0.3$ and $A_2(0)/A_1(0)= 0.7\pm 0.4$. Our predictions for the different form factors are in good agreement with the experimental data, although, in the case of $A_2(0)$, the errors are still too large to draw any firm conclusion. With the help of the Heavy Quark Effective Theory (HQET) we have also extrapolated the lattice results to $B$-meson decays. The form factors follow a behaviour compatible with the HQET predictions. Our results are in agreement with a previous lattice calculation, performed at $\beta=6.4$, using the standard Wilson action.
published_date 1995-12-31T03:34:38Z
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score 11.035634

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