Measurement of the form-factor ratios for D+→(K)over-bar☆0l+νl

被引：26

作者：

Aitala, EM ^{[1
]}

Amato, S

Anjos, JC

Appel, JA

Ashery, D

Banerjee, S

Bediaga, I

Blaylock, G

Bracker, SB

Burchat, P

Burnstein, RA

Carter, T

Carvalho, HS

Copty, NK

Cremaldi, LM

Darling, C

Denisenko, K

Fernandez, A

Fox, GF

Gagnon, P

Gobel, C

Gounder, K

Halling, AM

Herrera, G

Hurvits, G

James, C

Kasper, PA

Kwan, S

Langs, DC

Leslie, J

Lundberg, B

MayTal-Beck, S

Meadows, B

Neto, JRTD

Mihalcea, D

Milburn, RH

de Miranda, JM

Napier, A

Nguyen, A

d'Oliveira, AB

O'Shaughnessy, K

Peng, KC

Perera, LP

Purohit, MV

Quinn, B

Radeztsky, S

Rafatian, A

Reay, NW

Reidy, JJ

dos Reis, AC

机构：

[1] Univ Mississippi, University, MS 38677 USA

[2] Ctr Brasileiro Pesquisas Fis, Rio De Janeiro, Brazil

[3] Univ Calif Santa Cruz, Santa Cruz, CA 95064 USA

[4] Univ Cincinnati, Cincinnati, OH 45221 USA

[5] CINVESTAV, Mexico City 14000, DF, Mexico

[6] Fermilab Astrophys Ctr, Batavia, IL 60510 USA

[7] IIT, Chicago, IL 60616 USA

[8] Kansas State Univ, Manhattan, KS 66506 USA

[9] Univ Massachusetts, Amherst, MA 01003 USA

[10] Princeton Univ, Princeton, NJ 08544 USA

[11] Univ Autonoma Puebla, Mexico City, DF, Mexico

[12] Univ S Carolina, Columbia, SC 29208 USA

[13] Stanford Univ, Stanford, CA 94305 USA

[14] Tel Aviv Univ, IL-69978 Tel Aviv, Israel

[15] Tufts Univ, Medford, MA 02155 USA

[16] Univ Wisconsin, Madison, WI 53706 USA

[17] Yale Univ, New Haven, CT 06511 USA

来源：

PHYSICS LETTERS B | 1998年 / 440卷 / 3-4期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/S0370-2693(98)01243-X

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The form factor ratios r(V)= V(0)/A(1)(0), r(2)=A(2)(0)/A(1)(0) and r(3)=A(3)(0)/A(1)(0) in the decay D+-->(K) over bar*(0)l(+)nu(l) (K) over bar*(0) --> K- pi(+) have been measured using data from charm hadroproduction experiment E791 at Fermilab. From 3034 (595) signal (background) events in the muon channel, we obtain r(V) = 1.84 +/- 0.11 +/- 0.09, r(2) = 0.75 +/- 0.08 +/- 0.09 and, as a first measurement of r(3), we find 0.04 +/- 0.33 +/- 0.29. The values of the form factor ratios r(V) and r(2) measured for the muon channel are combined with the values of r(V) and r(2) that we have measured in the electron channel. The combined E791 results for the muon and electron channels are r(V)= 1.87 +/- 0.08 +/- 0.07 and r(2) = 0.73 +/- 0.06 +/- 0.08. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

页码：435 / 441

页数：7

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