A measurement of lifetime differences in the neutral D-meson system

被引：110

作者：

Link, JM ^{[1
]}

Paolone, VS

Reyes, M

Yager, PM

Anjos, JC

Bediaga, I

Göbel, C

Magnin, J

de Miranda, JM

Pepe, IM

dos Reis, AC

Simao, FRA

Vale, MA

Carrillo, S

Casimiro, E

Mendez, H

Sánchez-Hernández, A

Uribe, C

Vazquez, F

Cinquini, L

Cumalat, JP

Ramirez, JE

O'Reilly, B

Vaandering, EW

Butler, JN

Cheung, HWK

Gaines, I

Garbincius, PH

Garren, LA

Gottschalk, E

Gourlay, SA

Kasper, PH

Kreymer, AE

Kutschke, R

Bianco, S

Fabbri, FL

Sarwar, S

Zallo, A

Cawlfield, C

Kim, DY

Park, KS

Rahimi, A

Wiss, J

Gardner, R

Chung, YS

Kang, JS

Ko, BR

Kwak, JW

Lee, KB

Myung, SS

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] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA

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

[6] Univ Illinois, Urbana, IL 61801 USA

[7] Indiana Univ, Bloomington, IN 47405 USA

[8] Korea Univ, Seoul 136701, South Korea

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

[10] Univ Milan, Milan, Italy

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

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

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

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

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

[16] Univ Tennessee, Knoxville, TN 37996 USA

[17] Vanderbilt Univ, Nashville, TN 37235 USA

[18] Univ Wisconsin, Madison, WI 53706 USA

[19] Yonsei Univ, Seoul 120749, South Korea

[20] Univ Colorado, Boulder, CO 80309 USA

来源：

PHYSICS LETTERS B | 2000年 / 485卷 / 1-3期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/S0370-2693(00)00694-8

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Using a high statistics sample of photoproduced charm particles from the FOCUS experiment at Fermilab, we compare the lifetimes of neutral D mesons decaying via D-0 --> K- pi(+) and K-K+ to measure the lifetime differences between CP even and CP odd final states. These measurements bear on the phenomenology of D-0 - (D) over bar(0) mixing. If the D-0 --> K- pi(+) is an equal mixture of CP even and CP odd eigenstates, we measure y(CP) = (Gamma(CP even) - Gamma(CP odd))/(Gamma(CP even) + Gamma(CP odd)) = 0.0342 +/- 0.0139 +/- 0.0074. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：62 / 70

页数：9

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