Branching fractions for D0→K+K- and D0→π+π-, and a search for CP violation in D0 decays

被引：42

作者：

Aitala, EM ^{[1
]}

Amato, S

Anjos, JC

Appel, JA

Ashery, D

Banerjee, S

Bediaga, I

Blaylock, G

Bracker, SB

Burchat, PR

Burnstein, RA

Carter, T

Carvalho, HS

Copty, NJ

Cremaldi, LM

Darling, C

Denisenko, K

Fernandez, A

Fox, G

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

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

Rubin, HA

机构：

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

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

[3] Univ Cincinnati, Cincinnati, OH 45221 USA

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

[5] Fermilab, Batavia, IL 60510 USA

[6] IIT, Chicago, IL 60616 USA

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

[8] Univ Massachusetts, Amherst, MA 01003 USA

[9] Univ Mississippi, University, MS 38677 USA

[10] Ohio State Univ, Columbus, OH 43210 USA

[11] Princeton Univ, Princeton, NJ 08544 USA

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

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

[14] Stanford Univ, Stanford, CA 94305 USA

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

[16] Tufts Univ, Medford, MA 02155 USA

[17] Univ Wisconsin, Madison, WI 53706 USA

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

来源：

PHYSICS LETTERS B | 1998年 / 421卷 / 1-4期

关键词：

D O I：

10.1016/S0370-2693(97)01570-0

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Using the large hadroproduced charm sample collected in experiment E791 at Fermilab, we have measured ratios of branching fractions for the two-body singly-Cabibbo-suppres sed charged decays of the D-0* Gamma(D-0 --> K+ K-)/Gamma(D0 --> K- pi(+)) = 0.109 +/- 0.003 +/- 0.003 Gamma(D-0--> K+K-)/Gamma(D0 --> K-K+) = 0.040 +/- 0.002 +/- 0.003, and Gamma(D0 --> K+K-)/Gamma(D-0 --> pi(+)pi(-)) = 2.75 +/- 0.15 +/- 0.16. We have looked for differences in the decay rates of D-0 and (D) over bar(-0) to the CP eigenstates K+K- and pi(+)pi(-), and have measured the CP asymmetry parameters A(CP)(K+ K-) = -0.010 +/- 0.049 +/- 0.012 and A(CP)(pi(+) pi(-)) = -0.049 +/- 0.078 +/- 0.030, both consistent with zero. (C) 1998 Elsevier Science B.V.

引用

页码：405 / 411

页数：7

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