BaBar Collaboration (Including:

). (2009) Search for the Z(4430)(-) at BABAR. Physical Review D (Particles, Fields, Gravitation and Cosmology), Vol.79 (No.11). article no. 112001. doi:10.1103/PhysRevD.79.112001

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Abstract

We report the results of a search for Z(4430)(-) decay to J/psi pi(-) or psi(2S)pi(-) in B--,B-0 -> J/psi pi K--(0,+) and B--,B-0 -> psi(2S)pi K--(0,+) decays. The data were collected with the BABAR detector at the SLAC PEP-II asymmetric-energy e(+)e(-) collider operating at center-of-mass energy 10.58 GeV, and the sample corresponds to an integrated luminosity of 413 fb(-1). Each K pi(-) mass distribution exhibits clear K*(892) and K-2*(1430) signals, and the efficiency-corrected spectrum is well described by a superposition of the associated Breit-Wigner intensity distributions, together with an S-wave contribution obtained from the LASS I = 1/2 K pi(-) scattering amplitude measurements. Each K pi(-) angular distribution varies significantly in structure with K pi(-) mass, and is represented in terms of low-order Legendre polynomial moments. We find that each J/psi pi(-) or psi(2S)pi(-) mass distribution is well described by the reflection of the measured K pi(-) mass and angular distribution structures. We see no significant evidence for a Z(4430)(-) signal for any of the processes investigated, neither in the total J/psi pi(-) or psi(2S)pi(-) mass distribution, nor in the corresponding distributions for the regions of K pi(-) mass for which observation of the Z(4430)(-) signal was reported. We obtain branching-fraction upper limits B(B--> Z(-)(K) over bar (0), Z(-)-> J/psi pi(-))<1.5x10(-5), B(B-0 -> Z(-)K(+), Z(-)-> J/psi pi(-))<0.4x10(-5), B(B--> Z(-)(K) over bar (0), Z(-)->psi(2S)pi(-))<4.7x10(-5), and B(B-0 -> Z(-)K(+), Z(-)->psi(2S)pi(-))<3.1x10(-5) at 95% confidence level, where the Z(4430)(-) mass and width have been fixed to the reported central values.

Item Type:	Journal Article
Subjects:	Q Science > QB Astronomy Q Science > QC Physics
Divisions:	Faculty of Science > Physics
Journal or Publication Title:	Physical Review D (Particles, Fields, Gravitation and Cosmology)
Publisher:	American Physical Society
ISSN:	1550-7998
Official Date:	June 2009
Dates:	Date Event June 2009 Published
Volume:	Vol.79
Number:	No.11
Number of Pages:	38
Page Range:	article no. 112001
DOI:	10.1103/PhysRevD.79.112001
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access

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