Search for CP violation in the decays D+ → KSπ+ and D+ → KSK+ -: art. no. 041602

被引：32

作者：

Link, JM ^{[1
]}

Reyes, M

Yager, PM

Anjos, JC

Bediaga, I

Göbel, C

Magnin, J

Massafferri, A

de Miranda, JM

Pepe, IM

dos Reis, AC

Carrillo, S

Casimiro, E

Sánchez-Hernández, A

Uribe, C

Vázquez, F

Cinquini, L

Cumalat, JP

O'Reilly, B

Ramirez, JE

Vaandering, EW

Butler, JN

Cheung, HWK

Gaines, I

Garbincius, PH

Garren, LA

Gottschalk, E

Kasper, PH

Kreymer, AE

Kutschke, R

Bianco, S

Fabbri, FL

Zallo, A

Cawlfield, C

Kim, DY

Rahimi, A

Wiss, J

Gardner, R

Kryemadhi, A

Chung, YS

Kang, JS

Ko, BR

Kwak, JW

Lee, KB

Park, H

Alimonti, G

Boschini, M

D'Angelo, P

DiCorato, M

Dini, P

机构：

[1] Univ Calif Davis, Davis, CA 95616 USA

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

[3] CINVESTAV, Mexico City 07000, DF, Mexico

[4] Univ Colorado, Boulder, CO 80309 USA

[5] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA

[6] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy

[7] Univ Illinois, Urbana, IL 61801 USA

[8] Indiana Univ, Bloomington, IN 47405 USA

[9] Korea Univ, Seoul 136701, South Korea

[10] Ist Nazl Fis Nucl, I-20133 Milan, Italy

[11] Univ Milan, Milan, Italy

[12] Univ N Carolina, Asheville, NC 28804 USA

[13] Univ Pavia, Dipartimento Fis Nucl & Teor, I-27100 Pavia, Italy

[14] Ist Nazl Fis Nucl, I-27100 Pavia, Italy

[15] Univ Puerto Rico, Mayaguez, PR 00681 USA

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

[17] Univ Tennessee, Knoxville, TN 37996 USA

[18] Vanderbilt Univ, Nashville, TN 37235 USA

[19] Univ Wisconsin, Madison, WI 53706 USA

来源：

PHYSICAL REVIEW LETTERS | 2002年 / 88卷 / 04期

关键词：

D O I：

10.1103/PhysRevLett.88.041602

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A high-statistics sample of photoproduced charm from the FOCUS experiment has been used to search for direct CP violation in the decay rates for D+ --> K(S)pi(+) and D+ --> KSK+. We have measured the following asymmetry parameters relative to D+ --> K- pi(+) pi(+): A(CP)(K(S)pi(+)) = (-1.6 +/- 1.5 +/- 0.9)%, A(CP)(KSK+) = (+6.9 +/- 6.0 +/- 1.5)%, and A(CP)(KSK+) = (+7.1 +/- 6.1 +/- 1.2)% relative to D+ --> K(S)pi(+). We have also measured the relative branching ratios and found Gamma(D+ --> (K) over bar K-0(+))/Gamma(D+ --> (K) over bar (0)pi(+))/Gamma(D+ --> K- pi(+) pi(+)) = (30.60 +/- 0.46 +/- 0.32)%, Gamma(D+ --> (K) over bar K-0(+))/Gamma(D+ --> K- pi(+) pi(+)) = (6.04 +/- 0.35 +/- 0.30)%, and Gamma(D+ --> (K) over bar K-0(-))/Gamma(D+ --> (K) over bar (0)pi(+)) = (19.96 +/- 1.19 +/- 0.96)%.

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