Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2009-10-30
Physics
High Energy Physics
High Energy Physics - Experiment
7 page, 3 figures; version 2 gives some more details, data unchanged; version 3 updated authors, text shortened, data unchange
Scientific paper
The COMPASS experiment at the CERN SPS has studied the diffractive dissociation of negative pions into the pi- pi- pi+ final state using a 190 GeV/c pion beam hitting a lead target. A partial wave analysis has been performed on a sample of 420000 events taken at values of the squared 4-momentum transfer t' between 0.1 and 1 GeV^2/c^2. The well-known resonances a1(1260), a2(1320), and pi2(1670) are clearly observed. In addition, the data show a significant natural parity exchange production of a resonance with spin-exotic quantum numbers J^PC = 1-+ at 1.66 GeV/c^2 decaying to rho pi. The resonant nature of this wave is evident from the mass-dependent phase differences to the J^PC = 2-+ and 1++ waves. From a mass-dependent fit a resonance mass of 1660 +- 10+0-64 MeV/c^2 and a width of 269+-21+42-64 MeV/c^2 is deduced.
Alekseev Anton
The COMPASS Collaboration
No associations
LandOfFree
Observation of a J^PC = 1-+ exotic resonance in diffractive dissociation of 190 GeV/c pi- into pi- pi- pi+ does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Observation of a J^PC = 1-+ exotic resonance in diffractive dissociation of 190 GeV/c pi- into pi- pi- pi+, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Observation of a J^PC = 1-+ exotic resonance in diffractive dissociation of 190 GeV/c pi- into pi- pi- pi+ will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-89641