We present new CDF data on exclusive K+K− and pp¯¯¯ production. Data were taken at s√=1960GeV and 900 GeV in low pile-up conditions. Events were selected with exactly two well-measured central tracks with pT > 300 MeV/c and |η| < 0.8 and no evidence for other particles (including calorimeter clusters) in the range −5.9 < η < +5.9, signifying two rapidity gaps exceeding Δη = 5.1. These events should be dominated by double pomeron exchange, with a central state having IG JPC = 0+(even)++. Kaons and (anti-)protons were identified using a barrel of time-of-flight scintillation counters. The mass spectrum M(K+ K−) shows evidence for novel resonance structure in the region 1500 − 1800 MeV/c2.
Central exclusive K+K− production in CDF
Gioiosa A
Primo
2017-01-01
Abstract
We present new CDF data on exclusive K+K− and pp¯¯¯ production. Data were taken at s√=1960GeV and 900 GeV in low pile-up conditions. Events were selected with exactly two well-measured central tracks with pT > 300 MeV/c and |η| < 0.8 and no evidence for other particles (including calorimeter clusters) in the range −5.9 < η < +5.9, signifying two rapidity gaps exceeding Δη = 5.1. These events should be dominated by double pomeron exchange, with a central state having IG JPC = 0+(even)++. Kaons and (anti-)protons were identified using a barrel of time-of-flight scintillation counters. The mass spectrum M(K+ K−) shows evidence for novel resonance structure in the region 1500 − 1800 MeV/c2.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
