Search for the Z(4430)(-) at BABAR

By T. Aubert, et al. 2008

142 citations recorded by the source corpus.

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^-)<1.5×10^(-5), [script B](B^0 → Z^-K^+,Z^- → J/Ψ π^-)<0.4×10^(-5), [script B](B → Z-[overline K]0,Z → Ψ(2S)π-)<4.7×10-5, and [script B](B^0 → Z^-K^+,Z^- → Ψ(2S)π^-)<3.1×10^(-5) at 95% confidence level, where the Z(4430)- mass and width have been fixed to the reported central values

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/2a0f73049ec8907b249c24dcc54d570c11424d17

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In Nuclear and High Energy Physics

Citations in the corpus

Observation of $J/\psi p$ Resonances Consistent with Pentaquark States in $\Lambda_b^0 \to J/\psi K^- p$ Decays (2015, methodology): “Such a method was used by the BaBar collaboration [65] and later improved upon by the LHCb collaboration [20].”
The XYZ states: Experimental and theoretical status and perspectives (2019, methodology): “After Belle claimed that a charged Zc(4430) particle was discovered, BaBar analyzed the same process using an integrated luminosity of 413 fb−1 Υ(4S ) data [263].”
Multiquark States (2017, methodology): “This observation was soon questioned by the BaBar experiment [145].”
Implications of LHCb measurements and future prospects - eScholarship (2013, background): “For example: the Y family, Y (4260), Y (4320) and Y (4660), of spin parity 1−, or the puzzling charged Z family, Z(4050), Z(4250) and Z(4430), so far observed only by the Belle experiment [539–541], and not confirmed by BaBar [542,543].”
Exotics: Heavy pentaquarks and tetraquarks (2017, methodology): “ giving a mass of 4433 +184 +302 MeV and a width of 45 13 13 MeV. This is quite narrow for a state with such a high mass. BABAR found contrary evidence for the Z+ c (4430) with a data set of 413 fb 1 [129]. The argument was based upon the observation that the kinematic variables in this nal state ar”
Exotic Hadrons from Heavy Ion Collisions (2017, result): “Although the BaBar collaboration did not confirm the Zc(4430) [147], the Dalitz plot analysis of the B decay by Belle reconfirmed the original findings [148].”
Nonstandard heavy mesons and baryons: Experimental evidence (2017, methodology): “The LHCb collaboration also performed an analysis of their B̄ → ψ′π+K− events using a K−π+ modelindependent approach (111) similar to the one that was earlier performed by the BaBar collaboration (335).”