IMPROVED LATTICE STUDY OF SEMILEPTONIC DECAYS OF D-MESONS

被引：49

作者：

BOWLER, KC ^{[1
]}

HAZEL, NM ^{[1
]}

HOEBER, H ^{[1
]}

KENWAY, RD ^{[1
]}

RICHARDS, DG ^{[1
]}

LELLOUCH, L ^{[1
]}

NIEVES, J ^{[1
]}

SACHRAJDA, CT ^{[1
]}

WITTIG, H ^{[1
]}

机构：

[1] UNIV SOUTHAMPTON, DEPT PHYS, SOUTHAMPTON SO17 1BJ, HANTS, ENGLAND

来源：

PHYSICAL REVIEW D | 1995年 / 51卷 / 09期

关键词：

D O I：

10.1103/PhysRevD.51.4905

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present results of a lattice computation of the matrix elements of the vector and axial-vector currents which are relevant for the semileptonic decays D→K and D→K*. The computations are performed in the quenched approximation to lattice QCD on a 243×48 lattice at β=6.2, using an O(a)-improved fermionic action. In the limit of zero lepton masses the semileptonic decays D→K and D→K* are described by four form factors: fK+, V, A1, and A2, which are functions of q2, where qμ is the four-momentum transferred in the process. Our results for these form factors at q2=0 are fK+(0)=0.67-8+7, V(0)=1.01-13+30, A1(0)=0.70-10+7, A2(0)=0.66-15+10, which are consistent with the most recent experimental world average values. We have also determined the q2 dependence of the form factors, which we find to be reasonably well described by a simple pole-dominance model. Results for other form factors, including those relevant to the decays D→π and D→ρ, are also given. © 1995 The American Physical Society.

引用

页码：4905 / 4923

页数：19

共 66 条

[1] SEMILEPTONIC DECAYS OF HEAVY FLAVORS ON A FINE-GRAINED LATTICE [J].

ABADA, A ;

ALLTON, CR ;

BOUCAUD, P ;

CARPENTER, DB ;

CRISAFULLI, M ;

GUSKEN, S ;

HERNANDEZ, P ;

LUBICZ, V ;

MARTINELLI, G ;

PENE, O ;

SACHRAJDA, CT ;

SCHILLING, K ;

SIEGERT, G ;

SOMMER, R .

NUCLEAR PHYSICS B, 1994, 416 (02) :675-695

[2]

ABADA A, LATTICE 93, P477

[3] MEASUREMENT OF THE BRANCHING FRACTIONS FOR DO-]PI-E+VE AND DO-]K-E+VE AND DETERMINATION OF [VCD/VCS]2 [J].

ADLER, J ;

BECKER, JJ ;

BLAYLOCK, GT ;

BOLTON, T ;

BRIENT, JC ;

BROWDER, T ;

BROWN, JS ;

BUNNELL, KO ;

BURCHELL, M ;

BURNETT, TH ;

CASSELL, RE ;

COFFMAN, D ;

COOK, V ;

COWARD, DH ;

DEJONGH, F ;

DORFAN, DE ;

DRINKARD, J ;

DUBOIS, GP ;

EIGEN, G ;

EINSWEILER, KF ;

EISENSTEIN, BI ;

FREESE, T ;

GATTO, C ;

GLADDING, G ;

GRAB, C ;

HAMILTON, RP ;

HAUSER, J ;

HEUSCH, CA ;

HITLIN, DG ;

IZEN, JM ;

KIM, PC ;

KOPKE, L ;

LI, A ;

LOCKMAN, WS ;

MALLIK, U ;

MATTHEWS, CG ;

MINCER, AI ;

MIR, R ;

MOCKETT, PM ;

MOZLEY, RF ;

NEMATI, B ;

ODIAN, A ;

PARRISH, L ;

PARTRIDGE, R ;

PITMAN, D ;

PLAETZER, SA ;

RICHMAN, JD ;

SADROZINSKI, HFW ;

SCARLATELLA, M ;

SCHALK, TL .

PHYSICAL REVIEW LETTERS, 1989, 62 (16) :1821-1824

[4] MEASUREMENT OF THE RATIO-BETA(D+-]PI(0)L+NU) BETA(D+-](K)OVER-BAR(0)L+NU) [J].

ALAM, MS ;

KIM, IJ ;

NEMATI, B ;

ONEILL, JJ ;

SEVERINI, H ;

SUN, CR ;

ZOELLER, MM ;

CRAWFORD, G ;

DAUBENMIER, CM ;

FULTON, R ;

FUJINO, D ;

GAN, KK ;

HONSCHEID, K ;

KAGAN, H ;

KASS, R ;

LEE, J ;

MALCHOW, R ;

MORROW, F ;

SKOVPEN, Y ;

SUNG, M ;

WHITE, C ;

WHITMORE, J ;

WILSON, P ;

BUTLER, F ;

FU, X ;

KALBFLEISCH, G ;

LAMBRECHT, M ;

ROSS, WR ;

SKUBIC, P ;

SNOW, J ;

WANG, PL ;

WOOD, M ;

BORTOLETTO, D ;

BROWN, DN ;

FAST, J ;

MCILWAIN, RL ;

MIAO, T ;

MILLER, DH ;

MODESITT, M ;

SCHAFFNER, SF ;

SHIBATA, EI ;

SHIPSEY, IPJ ;

WANG, PN ;

BATTLE, M ;

ERNST, J ;

KROHA, H ;

ROBERTS, S ;

SPARKS, K ;

THORNDIKE, EH ;

WANG, CH .

PHYSICAL REVIEW LETTERS, 1993, 71 (09) :1311-1315

[5] OBSERVATION OF THE DECAYS DS--]PHI-E-NU-BAR AND D--]K-STAR0E-NU-BAR [J].

ALBRECHT, H .

PHYSICS LETTERS B, 1991, 255 (04) :634-638

[6]

ALIEV TM, 1984, SOV J NUCL PHYS+, V40, P527

[7]

ALIEV TM, IC89382 TRIEST REP

[8] LIGHT HADRON SPECTRUM AND DECAY CONSTANTS IN QUENCHED LATTICE QCD [J].

ALLTON, CR ;

LELLOUCH, L ;

SACHRAJDA, CT ;

WITTIG, H ;

BAXTER, RM ;

BOOTH, SP ;

BOWLER, KC ;

HENTY, DS ;

KENWAY, RD ;

MCNEILE, C ;

PENDLETON, BJ ;

RICHARDS, DG ;

SIMONE, JN ;

SIMPSON, AD .

PHYSICAL REVIEW D, 1994, 49 (01) :474-485

[9] QUENCHED LIGHT HADRON MASS-SPECTRUM AND DECAY CONSTANTS - THE EFFECTS OF O(A) IMPROVEMENT AT BETA=6.2 [J].

ALLTON, CR ;

SACHRAJDA, CT ;

BAXTER, RM ;

BOOTH, SP ;

BOWLER, KC ;

COLLINS, S ;

HENTY, DS ;

KENWAY, RD ;

MCNEILE, C ;

PENDLETON, BJ ;

RICHARDS, DG ;

SIMONE, JN ;

SIMPSON, AD ;

MCKERRELL, A ;

MICHAEL, C ;

PRISZNYAK, M .

NUCLEAR PHYSICS B, 1993, 407 (02) :331-355

[10] GAUGE-INVARIANT SMEARING AND MATRIX CORRELATORS USING WILSON FERMIONS AT BETA=6.2 [J].

ALLTON, CR ;

SACHRAJDA, CT ;

BAXTER, RM ;

BOOTH, SP ;

BOWLER, KC ;

COLLINS, S ;

HENTY, DS ;

KENWAY, RD ;

PENDLETON, BJ ;

RICHARDS, DG ;

SIMONE, JN ;

SIMPSON, AD ;

WILKES, BE ;

MICHAEL, C .

PHYSICAL REVIEW D, 1993, 47 (11) :5128-5137

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