Measurement of B(B-→D0π-) and B((B)over-bar0→ D+π-) and isospin analysis of (B)over-bar→Dπ decays -: art. no. 031101

被引：28

作者：

Ahmed, S ^{[1
]}

Alam, MS

Jian, L

Saleem, M

Wappler, F

Eckhart, E

Gan, KK

Gwon, C

Hart, T

Honscheid, K

Hufnagel, D

Kagan, H

Kass, R

Pedlar, TK

Thayer, JB

von Toerne, E

Wilksen, T

Zoeller, MM

Muramatsu, H

Richichi, SJ

Severini, H

Skubic, P

Dytman, SA

Mueller, JA

Nam, S

Savinov, V

Chen, S

Hinson, JW

Lee, J

Miller, DH

Pavlunin, V

Shibata, EI

Shipsey, IPJ

Cronin-Hennessy, D

Lyon, AL

Park, CS

Park, W

Thorndike, EH

Coan, TE

Gao, YS

Liu, F

Maravin, Y

Stroynowski, R

Artuso, M

Boulahouache, C

Bukin, K

Dambasuren, E

Khroustalev, K

Mountain, R

Nandakumar, R

机构：

[1] SUNY Albany, Albany, NY 12222 USA

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

[3] Univ Oklahoma, Norman, OK 73019 USA

[4] Univ Pittsburgh, Pittsburgh, PA 15260 USA

[5] Purdue Univ, W Lafayette, IN 47907 USA

[6] Univ Rochester, Rochester, NY 14627 USA

[7] So Methodist Univ, Dallas, TX 75275 USA

[8] Syracuse Univ, Syracuse, NY 13244 USA

[9] Univ Texas Pan Amer, Edinburg, TX 78539 USA

[10] Vanderbilt Univ, Nashville, TN 37235 USA

[11] Wayne State Univ, Detroit, MI 48202 USA

[12] CALTECH, Pasadena, CA 91125 USA

[13] Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA

[14] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA

[15] Cornell Univ, Ithaca, NY 14853 USA

[16] Univ Florida, Gainesville, FL 32611 USA

[17] Harvard Univ, Cambridge, MA 02138 USA

[18] Univ Illinois, Urbana, IL 61801 USA

[19] Carleton Univ, Ottawa, ON K1S 5B6, Canada

[20] Inst Particle Phys, Toronto, ON M5S 1A7, Canada

[21] Univ Kansas, Lawrence, KS 66045 USA

[22] Univ Minnesota, Minneapolis, MN 55455 USA

[23] Northwestern Univ, Evanston, IL 60208 USA

来源：

PHYSICAL REVIEW D | 2002年 / 66卷 / 03期

关键词：

D O I：

10.1103/PhysRevD.66.031101

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present new measurements of branching fractions for the color-favored decays B--->D(0)pi(-) and (B) over bar (0)-->D(+)pi(-). Using 9.67x10(6) B (B) over bar pairs collected with the CLEO detector, we obtain the branching fractions B(B--->D(0)pi(-))=(49.7+/-1.2+/-2.9+/-2.2)x10(-4) and B((B) over bar (0)-->D(+)pi(-))=(26.8+/-1.2+/-2.4+/-1.2)x10(-4). The first error is statistical, the second is systematic, and the third is due to the experimental uncertainty on the production ratio of charged and neutral B mesons in Y(4S) decays. These results, together with the current world average for the color-suppressed branching fraction B((B) over bar (0)-->D(0)pi(0)), are used to determine the cosine of the strong phase difference delta(I) between the I=1/2 and I=3/2 isospin amplitudes. We find cos delta(I)=0.863(-0.023-0.035-0.030)(+0.024+0.036+0.038), and obtain a 90% confidence interval of 16.5degrees<delta(I)<38.1degrees. This nonzero value of delta(I) suggests the presence of final state interactions in the Dpi system.

引用

页数：5

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