ENTRY O1318 20070522 O030O131800000001 SUBENT O1318001 20070522 O030O131800100001 BIB 13 55 O131800100002 TITLE Measurement of the p+d-->p+d+eta cross section in O131800100003 complete kinematics. O131800100004 REFERENCE (J,PR/C,69,014003,2004) O131800100005 REL-REF (R,O0896001,R.BILGER+,J,PR/C,65,044608,2002) More O131800100006 details of experiment and p+d- He-3+eta reaction O131800100007 AUTHOR (R.Bilger, W.Brodowski, H.Calen, H.Clement, C.Ekstrom, O131800100008 G.Faeldt, K.Fransson, L.Gustafsson, B.Hoeistad, O131800100009 A.Johansson, T.Johansson, K.Kilian, S.Kullander, O131800100010 A.Kupsc, G.Kurz, P.Marciniewski, B.Morosov, O131800100011 A.Moertsell, W.Oelert, V.Renken, R.Ruber, B.Shwartz, O131800100012 V.Sorov, J.Stepaniak, A.Sukhanov, P.Thoerngren-Engblom,O131800100013 A.Turowiecki, G.J.Wagner, Z.Wilhelmi, C.Wilkin, O131800100014 J.Zabierowski, J.Zlomanczuk) O131800100015 INSTITUTE (2GERTUE) O131800100016 (2SWDUPP) Department of radiation sciences and O131800100017 the Svedberg laboratory. O131800100018 (2GERJUL) O131800100019 (4ZZZDUB) O131800100020 (4RUSITE) O131800100021 (4RUSSIB) O131800100022 (3POLIPJ) Soltan institute for nuclear studies O131800100023 (3POLWWA) Institute of experimental physics O131800100024 (2UK LON) Physics and astronomy department, UCL,London O131800100025 PART-DET (P,D,G) O131800100026 DETECTOR (SPEC) Many detector system. O131800100027 Detailed description see in Rel-Ref. O131800100028 The eta-meson could be detected directly through its O131800100029 2-gamma decay mode, with the photons registered in theO131800100030 central detector, consisting of two arrays of Cs(I) O131800100031 crystal preceded by veto-counters. All protons and O131800100032 deuterons produced in p+d-p+d+eta reaction fall within O131800100033 the angular acceptance of the forward detector, in O131800100034 addition to the tracker, there are four set of O131800100035 scintillators. The forward trigger hodoscopes and O131800100036 forward range hodoscopes consisting of three 5-mm thickO131800100037 layers and four 11-cm layers, respectively, which are O131800100038 vital for particle identification and energy O131800100039 determination. O131800100040 FACILITY (SRING,2SWDUPP) The experiment was performed at the O131800100041 CELSIUS storage ring, using the WASA/PROMICE O131800100042 experimental setup. O131800100043 METHOD (COINC) O131800100044 HISTORY (20070518C) SB O131800100045 (20070522U) Last checking has been done. O131800100046 ADD-RES (COMP) The MONTE CARLO simulation O131800100047 COMMENT *By authors*.The major difficulty in measuring the O131800100048 p+d-p+d+eta reaction is the huge background coming fro O131800100049 other pd-x channels. The eta-peak is clear seen in the O131800100050 proton-deuteron missing mass distribution at all O131800100051 energies. O131800100052 ERR-ANALYS Such uncertainties in the rate of nuclear interactions O131800100053 introduce systematic errors in the final cross sectionsO131800100054 varying from 10% at 927-MeV to 17% at 1096-MeV,to theseO131800100055 must be added the overall normalization error of 20% O131800100056 quoted for the p+d-He-3+Eta reaction. O131800100057 ENDBIB 55 0 O131800100058 NOCOMMON 0 0 O131800100059 ENDSUBENT 58 0 O131800199999 SUBENT O1318002 20070522 O030O131800200001 BIB 3 6 O131800200002 REACTION (1-H-1(D,X)1-H-2,,DA) O131800200003 Acceptance-corrected distributions in the cosine of O131800200004 the c.m. angle of deuterons. O131800200005 ERR-ANALYS (DATA-ERR).The error is reported by authors on fig. O131800200006 (COS-ERR-D).Digitizing error of cosine of angle. O131800200007 STATUS (CURVE) Figure 7 O131800200008 ENDBIB 6 0 O131800200009 COMMON 2 3 O131800200010 EN COS-ERR-D O131800200011 MEV NO-DIM O131800200012 1032. 0.009 O131800200013 ENDCOMMON 3 0 O131800200014 DATA 3 19 O131800200015 COS-CM DATA-CM DATA-ERR O131800200016 NO-DIM NB/SR NB/SR O131800200017 -0.945 285. 23. O131800200018 -0.848 197. 15. O131800200019 -0.745 248. 21. O131800200020 -0.643 247. 21. O131800200021 -0.546 228. 21. O131800200022 -0.449 188. 22. O131800200023 -0.353 169. 22. O131800200024 -0.244 270. 28. O131800200025 -0.142 270. 30. O131800200026 -4.5E-02 230. 30. O131800200027 5.7E-02 310. 40. O131800200028 0.16 290. 50. O131800200029 0.256 300. 50. O131800200030 0.366 270. 50. O131800200031 0.461 370. 70. O131800200032 0.559 230. 60. O131800200033 0.661 280. 70. O131800200034 0.759 170. 70. O131800200035 0.855 230. 100. O131800200036 ENDDATA 21 0 O131800200037 ENDSUBENT 36 0 O131800299999 SUBENT O1318003 20070522 O030O131800300001 BIB 3 6 O131800300002 REACTION (1-H-1(D,X)1-H-1,,DA) O131800300003 Acceptance-corrected distributions in the cosine of O131800300004 the c.m. angle of protons. O131800300005 ERR-ANALYS (DATA-ERR).The error is reported by authors on fig. O131800300006 (COS-ERR-D).Digitizing error of cosine of angle. O131800300007 STATUS (CURVE) Figure 7 O131800300008 ENDBIB 6 0 O131800300009 COMMON 2 3 O131800300010 EN COS-ERR-D O131800300011 MEV NO-DIM O131800300012 1032. 0.009 O131800300013 ENDCOMMON 3 0 O131800300014 DATA 3 20 O131800300015 COS-CM DATA-CM DATA-ERR O131800300016 NO-DIM NB/SR NB/SR O131800300017 -0.959 370. 40. O131800300018 -0.86 277. 29. O131800300019 -0.758 350. 40. O131800300020 -0.659 230. 30. O131800300021 -0.566 400. 50. O131800300022 -0.46 310. 50. O131800300023 -0.356 250. 30. O131800300024 -0.254 320. 40. O131800300025 -0.154 220. 40. O131800300026 -5.8E-02 260. 30. O131800300027 4.6E-02 203. 26. O131800300028 0.15 186. 28. O131800300029 0.253 201. 21. O131800300030 0.357 191. 19. O131800300031 0.454 178. 15. O131800300032 0.55 215. 17. O131800300033 0.653 227. 19. O131800300034 0.755 271. 19. O131800300035 0.853 240. 19. O131800300036 0.955 274. 24. O131800300037 ENDDATA 22 0 O131800300038 ENDSUBENT 37 0 O131800399999 SUBENT O1318004 20070522 O030O131800400001 BIB 3 6 O131800400002 REACTION (1-H-1(D,X)0-ET-0,,DA) O131800400003 Acceptance-corrected distributions in the cosine of O131800400004 the c.m. angle of eta-meson. O131800400005 ERR-ANALYS (DATA-ERR).The error is reported by authors on fig. O131800400006 (COS-ERR-D).Digitizing error of cosine of angle. O131800400007 STATUS (CURVE) Figure 7 O131800400008 ENDBIB 6 0 O131800400009 COMMON 2 3 O131800400010 EN COS-ERR-D O131800400011 MEV NO-DIM O131800400012 1032. 0.009 O131800400013 ENDCOMMON 3 0 O131800400014 DATA 3 20 O131800400015 COS-CM DATA-CM DATA-ERR O131800400016 NO-DIM NB/SR NB/SR O131800400017 -0.961 240. 50. O131800400018 -0.851 180. 40. O131800400019 -0.762 280. 50. O131800400020 -0.657 190. 30. O131800400021 -0.555 290. 40. O131800400022 -0.457 220. 25. O131800400023 -0.355 320. 35. O131800400024 -0.245 300. 30. O131800400025 -0.148 300. 30. O131800400026 -5.1E-02 250. 30. O131800400027 5.3E-02 199. 22. O131800400028 0.156 231. 26. O131800400029 0.253 220. 22. O131800400030 0.356 300. 22. O131800400031 0.453 227. 26. O131800400032 0.557 231. 24. O131800400033 0.66 217. 20. O131800400034 0.763 245. 22. O131800400035 0.854 220. 20. O131800400036 0.957 206. 20. O131800400037 ENDDATA 22 0 O131800400038 ENDSUBENT 37 0 O131800499999 SUBENT O1318005 20070522 O030O131800500001 BIB 4 11 O131800500002 REACTION (1-H-2(P,X)0-ET-0,,SIG) O131800500003 ANALYSIS (INTAD) O131800500004 STATUS (TABLE) In paper O131800500005 ERR-ANALYS (DATA-ERR).The error is reported by authors on fig. O131800500006 In addition to the statistical errors quoted, there is O131800500007 an overall normalization uncertainty of about 20% O131800500008 arising from that in the p+d---He-3+eta and an effect O131800500009 due to interactions of particles in the detectors, O131800500010 which increases over our energy range from 10% to 17%. O131800500011 (EN-ERR).The +-1-MeV uncertainty in the beam energy O131800500012 corresponds to one of approximately +-0.55-MeV in Q. O131800500013 ENDBIB 11 0 O131800500014 COMMON 1 3 O131800500015 EN-ERR O131800500016 MEV O131800500017 0.1 O131800500018 ENDCOMMON 3 0 O131800500019 DATA 3 5 O131800500020 EN DATA DATA-ERR O131800500021 MEV MICRO-B MICRO-B O131800500022 927. 0.26 0.02 O131800500023 961. 0.8 0.04 O131800500024 996. 2. 0.1 O131800500025 1032. 3. 0.2 O131800500026 1096. 5.2 0.6 O131800500027 ENDDATA 7 0 O131800500028 ENDSUBENT 27 0 O131800599999 ENDENTRY 5 0 O131899999999