Evidence for exotic <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msup><mrow><mi>J</mi></mrow><mrow><mi>PC</mi></mrow></msup></mrow><mrow><msup><mrow><mo>=</mo><mn>1</mn><mn></mn></mrow><mrow><mi>−</mi><mo>+</mo></mrow></msup></mrow></math> meson production in the reaction <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msup><mrow><mi>π</mi></mrow><mrow><mi>−</mi></mrow></msup></mrow><mrow><mrow><mover><mrow><mi>p</mi></mrow><mrow><mo>→</mo></mrow></mover></mrow></mrow><mi>η</mi><mrow><msup><mrow><mi>π</mi></mrow><mrow><mi>−</mi></mrow></msup></mrow><mi>p</mi></math> at <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mn>18</mn><mi></mi><mi mathvariant="normal">GeV</mi><mo>/</mo><mi>c</mi></math>

S. U. Chung; K. Danyo; R. W. Hackenburg; C. Olchanski; D. P. Weygand; H. J. Willutzki; S. P. Denisov; V. A. Dorofeev; I. A. Kachaev; V. V. Lipaev; A. V. Popov; D. I. Ryabchikov; Z. Bar-Yam; J. P. Dowd; P. Eugenio; M. Hayek; W. Kern; E. King; N. Shenhav; V. A. Bodyagin; O. L. Kodolova; V. L. Korotkikh; M. A. Kostin; A. I. Ostrovidov; L. I. Sarycheva; N. B. Sinev; I. N. Vardanyan; A. A. Yershov; D. S. Brown; T. K. Pedlar; K. K. Seth; J. Wise; D. Zhao; T. Adams; J. M. Bishop; N. M. Cason; E. I. Ivanov; J. M. LoSecco; J. J. Manak; A. H. Sanjari; W. D. Shephard; D. L. Stienike; S. A. Taegar; D. R. Thompson; G. S. Adams; J. P. Cummings; J. Kuhn; M. Nozar; J. A. Smith; D. B. White; M. Witkowski; E852 Collaboration

doi:10.1103/PhysRevD.60.092001

Evidence for exotic $J^{PC} {= 1}^{- +}$ meson production in the reaction $π^{-} \vec{p} η π^{-} p$ at $18 GeV / c$

S. U. Chung, K. Danyo, R. W. Hackenburg, C. Olchanski, D. P. Weygand^*, and H. J. Willutzki

S. P. Denisov, V. A. Dorofeev, I. A. Kachaev, V. V. Lipaev, A. V. Popov, and D. I. Ryabchikov

Z. Bar-Yam, J. P. Dowd, P. Eugenio^†, M. Hayek^‡, W. Kern, E. King, and N. Shenhav^‡

V. A. Bodyagin, O. L. Kodolova, V. L. Korotkikh, M. A. Kostin, A. I. Ostrovidov, L. I. Sarycheva, N. B. Sinev, I. N. Vardanyan, and A. A. Yershov

D. S. Brown^§, T. K. Pedlar, K. K. Seth, J. Wise, and D. Zhao

T. Adams^∥, J. M. Bishop, N. M. Cason, E. I. Ivanov, J. M. LoSecco, J. J. Manak, A. H. Sanjari, W. D. Shephard, D. L. Stienike et al.

G. S. Adams, J. P. Cummings, J. Kuhn, M. Nozar, J. A. Smith, D. B. White, and M. Witkowski

Department of Physics, Brookhaven National Laboratory, Upton, New York 11973

Institute for High Energy Physics, Protvino, Russian Federation

Department of Physics, University of Massachusetts Dartmouth, North Dartmouth, Massachusetts 02747

Institute for Nuclear Physics, Moscow State University, Moscow, Russian Federation

Department of Physics, Northwestern University, Evanston, Illinois 60208

S. A. Taegar^¶ and D. R. Thompson

Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556

Department of Physics, Rensselaer Polytechnic Institute, Troy, New York 12180

^*Present address: Thomas Jefferson National Accelerator Facility, Newport News, VA 23606.
^†Present address: Department of Physics, Carnegie Mellon University, Pittsburgh, PA 15213.
^‡Permanent address: Rafael, Haifa, Israel.
^§Present address: Department of Physics, University of Maryland, College Park, MD 20742.
^∥Present address: Department of Physics, Kansas State University, Manhattan, KS 66506.
^¶Present address: Department of Physics, University of Arizona, Tucson, AZ 85721.

PDF

Phys. Rev. D 60, 092001 – Published 5 October, 1999

DOI: https://doi.org/10.1103/PhysRevD.60.092001

Abstract

Details of the analysis of the $η π^{-}$ system studied in the reaction $π^{-} \vec{p} η π^{-} p$ at $18 GeV / c$ are given. Separate analyses for the 2γ and $π^{+} π^{-} π^{0}$ decay modes of the η are presented. An amplitude analysis of the data indicates the presence of interference between the $a_{2}^{-} (1320)$ and a $J^{PC} {= 1}^{- +}$ wave between 1.2 and $1.6 GeV {/ c}^{2} .$ The phase difference between these waves shows a phase motion not attributable solely to the $a_{2}^{-} (1320) .$ The data can be fitted by interference between the $a_{2}^{-} (1320)$ and an exotic $1^{- +}$ resonance with $M = (1370 \pm 16_{- 30}^{+ 50}) MeV {/ c}^{2}$ and $Γ = (385 \pm 40_{- 105}^{+ 65}) MeV {/ c}^{2} .$ Our results are compared with those of other experiments.

Authorization Required

We need you to provide your credentials before accessing this content.

Physical Review D

Export citation

Export citation

Evidence for exotic $J^{PC} {= 1}^{- +}$ meson production in the reaction $π^{-} \vec{p} η π^{-} p$ at $18 GeV / c$

Abstract

Authorization Required

Other Options

References (Subscription Required)

Outline

Information

Filter

Filter

Article Lookup

Enter a citation

Evidence for exotic JPC=1−+ meson production in the reaction π−p→ηπ−p at 18GeV/c

Abstract

Authorization Required

Log in via your institution

Log in via APS Member Subscription

Other Options

References (Subscription Required)

Evidence for exotic $J^{PC} {= 1}^{- +}$ meson production in the reaction $π^{-} \vec{p} η π^{-} p$ at $18 GeV / c$