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Search for theZ(4430)−atBABAR
- Source :
- Physical Review D. 79
- Publication Year :
- 2009
- Publisher :
- American Physical Society (APS), 2009.
-
Abstract
- We report the results of a search for Z(4430)^- decay to J/Ψ π^- or Ψ(2S)π^- in B(^-.0)→ J/Ψ π^-K^(0.+) and B^(-.0) → Ψ(2S)π^-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 π^- 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 π^- scattering amplitude measurements. Each K π^- angular distribution varies significantly in structure with K π^- mass, and is represented in terms of low-order Legendre polynomial moments. We find that each J/Ψ π^- or Ψ (2S)π^- mass distribution is well described by the reflection of the measured K π^- 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/Ψ π^- or Ψ(2S) π^- mass distribution, nor in the corresponding distributions for the regions of K π- mass for which observation of the Z(4430)^- signal was reported. We obtain branching-fraction upper limits [script B](B^- → Z^-[overline K]^0,Z^- → J/Ψ π^-)
- Subjects :
- Physics
Nuclear and High Energy Physics
Particle physics
Mass distribution
010308 nuclear & particles physics
Electron–positron annihilation
01 natural sciences
law.invention
Luminosity
Nuclear physics
Scattering amplitude
Reflection (mathematics)
law
0103 physical sciences
Z(4430)
010306 general physics
Collider
Legendre polynomials
Subjects
Details
- ISSN :
- 15502368 and 15507998
- Volume :
- 79
- Database :
- OpenAIRE
- Journal :
- Physical Review D
- Accession number :
- edsair.doi...........1eba7714b8d31eab13d10eeae7ec4c28