A partial wave analysis of the $Ï^- Ï^- Ï^+$ and $Ï^- Ï^0 Ï^0$ systems and the search for a $J^{PC}=1^{-+}$ meson

A. R. Dzierba; R. Mitchell; E. Scott; P. Smith; M. Swat; S. Teige; A. Szczepaniak; S. P. Denisov; V. Dorofeev; I. Kachaev; V. Lipaev; A. Popov; D. I. Ryabchikov; V. Bodyagin; A. Demianov

doi:10.1103/PhysRevD.73.072001

paper

A partial wave analysis of the $I ¨ ^{-} I ¨ ^{-} I ¨ ^{+}$ and $I ¨ ^{-} I ¨ ^{0} I ¨ ^{0}$ systems and the search for a $J^{P C} = 1^{-+}$ meson

arXiv:hep-ex/0510068 · doi:10.1103/PhysRevD.73.072001

Abstract

A partial wave analysis (PWA) of the $I ¨ ^{-} I ¨ ^{-} I ¨ ^{+}$ and $I ¨ ^{-} I ¨ ^{0} I ¨ ^{0}$ systems produced in the reaction $I ¨ ^{-} p \to (3 I ¨ )^{-} p$ at 18 GeV/ $c$ was carried out using an \emph{isobar} model assumption. This analysis is based on 3.0M $I ¨ ^{-} I ¨ ^{0} I ¨ ^{0}$ events and 2.6M $I ¨ ^{-} I ¨ ^{-} I ¨ ^{+}$ events and shows production of the $a_{1} (1260)$ , $a_{2} (1320)$ , $I ¨ _{2} (1670)$ and $a_{4} (2040)$ resonances. Results of detailed studies of the stability of partial wave fits are presented. An earlier analysis of 250K $I ¨ ^{-} I ¨ ^{-} I ¨ ^{+}$ events from the same experiment showed possible evidence for a $J^{P C} = 1^{-+}$ exotic meson with a mass of $\sim$ 1.6 GeV/ $c^{2}$ decaying into $I ¨ I ¨ $ . In this analysis of a higher statistics sample of the $(3 I ¨ )^{-}$ system in two charged modes we find no evidence of an exotic meson.

Submitted to Physical Review D

A partial wave analysis of the I¨−I¨−I¨+ and I¨−I¨0I¨0 systems and the search for a JPC=1−+ meson

Abstract

A partial wave analysis of the $I ¨ ^{-} I ¨ ^{-} I ¨ ^{+}$ and $I ¨ ^{-} I ¨ ^{0} I ¨ ^{0}$ systems and the search for a $J^{P C} = 1^{-+}$ meson