Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2005-08-30
Physics
High Energy Physics
High Energy Physics - Experiment
7 pages 11 figures
Scientific paper
In the experiment with the SPHINX spectrometer in 1995-99 a new baryon state X(2000) -> Sigma^0K^+ was observed in the proton diffractive reactions p + N(C) -> Sigma^0K^+ + N(C). The main parameters of X(2000)^+ baryon are M = 1986 +- 6 MeV, Gamma = 98 +- 21 MeV. Unusual features of massive X(2000) state (narrow decay width Gamma/M simeq 0.05, anomalously large branching ratio with strange particle emission) make it serious candidate for cryptoexotic pentaquark baryon with hidden strangeness. New data on the SPHINX with by an order of magnitude enlarge statistics are in agreement with previous data and are supported our conclusions. We propose further studies X(2000) baryon production in the meson reactions with baryon exchange: pi^{+-} + p -> X(2000)^+ + pi^{+-} OZI - forbidden suppressed reaction for the state |qqqsbar{s}>) and K^{+-} + p -> X(2000)^+ + K^{+-} (OZI - allowed reaction). If the value of R=BR[pi^{+-} + p -> X(2000)^+ + pi^{+-}]/BR[K^{+-}+p -> X(2000)^+ + K^{+-}]<<1 it will be the crucial argument in favor of X(2000)= |qqqsbar{s}>) structure. These experiments may be done on IHEP separated kaon beam with OKA spectrometer.
No associations
LandOfFree
On the nature of new baryon state X(2000) observed in the experiments with the SPHINX spectrometer 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 On the nature of new baryon state X(2000) observed in the experiments with the SPHINX spectrometer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On the nature of new baryon state X(2000) observed in the experiments with the SPHINX spectrometer will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-20638