Study of the B{yields}X(3872)({yields}D*{sup 0}D{sup 0})K decay

Journal Article · Mon Feb 01 00:00:00 EST 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.81.031103· OSTI ID:21409137

Aushev, T ^[1]; Zwahlen, N; Bay, A; Louvot, R; Schneider, O; Vervink, K ^[1]; Adachi, I; Haba, J; Itoh, R; Iwasaki, Y; Krokovny, P; Nakao, M; Nishida, S; Sakai, Y; Trabelsi, K; Uehara, S; Uno, S; Wicht, J; Yamauchi, M ^[2]; Aihara, H ^[3]

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1. Ecole Polytechnique Federale de Lausanne (EPFL), Lausanne (Switzerland)
2. High Energy Accelerator Research Organization (KEK), Tsukuba (Japan)
3. Department of Physics, University of Tokyo, Tokyo (Japan)

We present a study of B{yields}X(3872)K with X(3872) decaying to D*{sup 0}D{sup 0} using a sample of 657x10{sup 6} BB pairs recorded at the {Upsilon}(4S) resonance with the Belle detector at the KEKB asymmetric-energy e{sup +}e{sup -} collider. Both D*{sup 0{yields}}D{sup 0{gamma}} and D*{sup 0{yields}}D{sup 0{pi}0} decay modes are used. We find a peak of 50.1{sub -11.1}{sup +14.8} events with a mass of (3872.9{sub -0.4-0.5}{sup +0.6+0.4}) MeV/c{sup 2}, a width of (3.9{sub -1.4-1.1}{sup +2.8+0.2}) MeV/c{sup 2} and a product branching fraction B(B{yields}X(3872)K)xB(X(3872){yields}D*{sup 0}D{sup 0})=(0.80{+-}0.20{+-}0.10)x10{sup -4}, where the first errors are statistical and the second ones are systematic. The significance of the signal is 6.4{sigma}. The difference between the fitted mass and the D*{sup 0}D{sup 0} threshold is calculated to be (1.1{sub -0.4-0.3}{sup +0.6+0.1}) MeV/c{sup 2}. We also obtain an upper limit on the product of branching fractions B(B{yields}Y(3940)K)xB(Y(3940){yields}D*{sup 0}D{sup 0}) of 0.67x10{sup -4} at 90% CL.

• OSTI ID: 21409137
• Journal Information: Physical Review. D, Particles Fields, Vol. 81, Issue 3; Other Information: DOI: 10.1103/PhysRevD.81.031103; (c) 2010 The American Physical Society; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANTI-D NEUTRAL MESONS
ASYMMETRY
B MESONS
BRANCHING RATIO
D NEUTRAL MESONS
ELECTRON-POSITRON COLLISIONS
KEK LINAC
MASS
MEV RANGE
PARTICLE DECAY
PEAKS
RESONANCE
ACCELERATORS
ANTIMATTER
ANTIMESONS
ANTIPARTICLES
BEAUTY MESONS
BEAUTY PARTICLES
BOSONS
CHARM PARTICLES
CHARMED MESONS
COLLISIONS
D MESONS
DECAY
DIMENSIONLESS NUMBERS
ELECTRON COLLISIONS
ELEMENTARY PARTICLES
ENERGY RANGE
HADRONS
LINEAR ACCELERATORS
MATTER
MESONS
POSITRON COLLISIONS
PSEUDOSCALAR ANTIMESONS
PSEUDOSCALAR MESONS