/*===================================================================*/ /* NRDF D1632 Data No.3 */ /*===================================================================*/ /* Bibliography */ /*===================================================================*/ \\BIB,3; D#=D1632; TITLE=/Search for proton-proton dibaryon resonances in the dp -> (pp)n reaction/; PURPOSE=/The present experiment has been performed to search for ppdibaryon resonances in the dp->ppn reaction/; ATH=(H.KAWAI'1', M.KOBAYASHI'1', J.HABA'1', T.HOMMA'1', K.MIYAKE'1', T.S.NAKAMURA'1', N.SASAO'1', Y.SUGIMOTO'1'); INST-ATH=(2JPNKTO'1'); /* '1' Department of Physics */ REF=NP/A; VLP=481(1988)806; RCTS=(P(D,D)P, P(D,2*P)N); PHQS=(ANGL-DSTRN, DATA'2'); /* '2' The pp mass distribution */ /*===================================================================*/ /* Experimental Conditions */ /*===================================================================*/ \\EXP,3; /* 2003-10-23 : Compiled */ CHM=ELM; PHYS-FORM=LIQD; THK-TGT=XMG/CM**2'3'; /* '3' The liquid hydrogen target with a cylindrical shape of 300 mm long and 50 mm in diameter was placed. */ POL-TGT=0%; ALGN-TGT=0%; ACC=SYN'4'; /* '4' A deuteron beam was separated from a secondary beam through an intermediate-energy beam line (K2) of 12 GeV Proton Synchrotron. */ INST-ACC=2JPNKEK; ERS-PRJ=[0.5%'5'; /* '5' The momentum resolution of about 0.5 percents was achieved. BEAM-INTNSTY=XPPS'6'; /* '6' A typical intensity of the deuteron beam was about 2-3E+5 particles per 400-msec-long machine spill. */ POL-PRJ=0%; ANT-COINC=NO; DET-SYS=(MAG'7',SCT'8',MWPC,X'9'); /* '7' C-type spectrometer magnet (TELAS) */ /* '8' Used as trigger counter and ToF counter [T.Tanimori et al., Nucl. Instr. Meth. 216(1983)57] */ /* '9' Drift chamber */ ERS-DET=[2.2%'10'; /* '10' about 2.4% (rms) for left arm and about 2.0% (rms) for right arm. */ /* Experimental Method: - Time-of-flight (The timing resolution of the ToF system was about 200 psec [T.Tanimori et al., Nucl. Instr. Meth. 216(1983)57].) RCT=P(D,2*P)N; PHQ=DATA'15'; /* '15' The pp mass distribution */ INC-MOM-LAB=2280MEV/C; DET-PARTCL=(P,P); COINC=(P,P); /*===================================================================*/ /* Descriptive Parameters */ /*===================================================================*/ \\DATA,3; INC-MOM-LAB=2280MEV/C; SYS-ERR=10%'16'; /* '16' Systematic error on the normalization */ NORM=/ To demonstrate the validity of the normalization, d+p elastic cross section evaliated was compared with the previous measurement by Booth et al [N.E.Booth et al., Phys. Rev. D4(1971)1261]. /; EMT-1=P; EMT-2=P; RSD=N; /*===================================================================*/ /* Data Table */ /*===================================================================*/ \DATA; DATA1'17' COUNTS DELTA-COUNTS (MEV/C**2) (ARB) (ARB) 1.971E+03 2.049E+01 +-2.147E+00 1.976E+03 3.552E+01 +-1.074E+00 1.980E+03 3.875E+01 +-2.684E+00 1.983E+03 6.881E+01 +-4.294E+00 1.988E+03 9.673E+01 +-6.977E+00 1.993E+03 1.466E+02 +-9.661E+00 1.999E+03 1.950E+02 +-7.514E+00 2.004E+03 2.406E+02 +-9.661E+00 2.010E+03 3.039E+02 +-9.661E+00 2.016E+03 3.979E+02 +-1.127E+01 2.020E+03 4.338E+02 +-1.073E+01 2.026E+03 4.703E+02 +-1.342E+01 2.031E+03 5.804E+02 +-1.771E+01 2.035E+03 5.471E+02 +-1.879E+01 2.039E+03 6.534E+02 +-2.040E+01 2.044E+03 7.092E+02 +-2.040E+01 2.049E+03 7.972E+02 +-2.415E+01 2.055E+03 8.375E+02 +-1.878E+01 2.060E+03 8.573E+02 +-2.576E+01 2.066E+03 8.853E+02 +-2.040E+01 2.071E+03 9.239E+02 +-2.791E+01 2.077E+03 9.760E+02 +-2.791E+01 2.083E+03 9.851E+02 +-3.113E+01 2.086E+03 1.005E+03 +-2.791E+01 2.091E+03 1.048E+03 +-2.040E+01 2.095E+03 1.105E+03 +-2.845E+01 2.100E+03 1.036E+03 +-3.059E+01 2.104E+03 1.035E+03 +-2.630E+01 2.109E+03 1.057E+03 +-2.791E+01 2.115E+03 1.065E+03 +-2.469E+01 2.122E+03 1.085E+03 +-2.362E+01 2.126E+03 1.025E+03 +-3.059E+01 2.132E+03 9.820E+02 +-2.791E+01 2.137E+03 9.895E+02 +-2.254E+01 2.141E+03 9.396E+02 +-2.898E+01 2.145E+03 9.385E+02 +-2.522E+01 2.149E+03 9.106E+02 +-2.469E+01 2.153E+03 9.047E+02 +-2.040E+01 2.158E+03 8.204E+02 +-2.254E+01 2.162E+03 7.818E+02 +-1.825E+01 2.169E+03 7.550E+02 +-2.952E+01 2.175E+03 6.793E+02 +-2.791E+01 2.181E+03 6.799E+02 +-2.362E+01 2.184E+03 6.396E+02 +-2.684E+01 2.190E+03 5.897E+02 +-2.093E+01 2.195E+03 5.237E+02 +-1.986E+01 2.200E+03 4.571E+02 +-1.986E+01 2.203E+03 3.809E+02 +-1.288E+01 2.207E+03 3.155E+02 +-6.441E+00 2.212E+03 1.974E+02 +-1.449E+01 2.216E+03 9.811E+01 +-4.294E+00 2.223E+03 6.860E+01 +-3.221E+00 2.227E+03 4.606E+01 +-4.831E+00 2.234E+03 3.480E+01 +-2.684E+00 2.238E+03 2.514E+01 +-2.684E+00 2.244E+03 1.442E+01 +-3.221E+00 \END; /*===================================================================*/ |