ENTRY O0793 20070712 O033O079300000001 SUBENT O0793001 20070712 O033O079300100001 BIB 12 40 O079300100002 TITLE Total and differential cross-sections for the pp ---> O079300100003 pp+eta reaction near threshold. O079300100004 REFERENCE (J,EPJ/A,20,345,2004) O079300100005 (J,NIM/A,376,397,1996). Internal beam O079300100006 facility COSY-11. O079300100007 (J,NIM/A,386,228,1997) A cluster O079300100008 hydrogen target O079300100009 AUTHOR (A.Khoukaz, I.Geck, C.Quentmeier, H.-H.Adam, O079300100010 A.Budzanowski, R.Czyzykiewicz, D.Grzonka, L.Jarczyk, O079300100011 K.Kilian, P.Kowina, N.Lang, T.Lister, P.Moskal, O079300100012 W.Oelert, C.Piskor-Ignatowicz, T.Rozek, R.Santo, O079300100013 G.Schepers, T.Sefzick, S.Sewerin, M.Siemaszk, O079300100014 J.Smyrski, A.Strzalkowski, A.Taeschner, P.Winter, O079300100015 M.Wolke, P.Wuestner, W.Zipper) O079300100016 INSTITUTE (2GERMST) Institut fuer Kernphysik, Westfalische O079300100017 Wilhelms-universitat. O079300100018 (3POLIFJ) O079300100019 (3POLUJK) O079300100020 (2GERJUL) O079300100021 (3POLPOL) Institute of physics, university of Silesia. O079300100022 SAMPLE A claster hydrogen target O079300100023 DETECTOR (SPEC) Tracks of positively charged particles, detectedO079300100024 in a set of two drift chambers can be traced back O079300100025 through the magnetic field to the interaction point, O079300100026 leading to a momentum determination. The velocities ofO079300100027 these particles are accessible via a time-of-flight O079300100028 path behind the drift chambers, consisting of two O079300100029 scintillation hodoscopes followed by a large O079300100030 scintillation wall at a distance of 9.3 m, acting as a O079300100031 stop detector. O079300100032 COMMENT -By author. By measuring the momentum and the O079300100033 velocity, particles are identified via invariant mass. O079300100034 FACILITY (SYNCY,2GERJUL) COSY and internal beam facility COSY-11O079300100035 METHOD (TOF,MAGFR) O079300100036 EN-SEC (E-LVL,ETA) MASS=958 MeV O079300100037 HISTORY (20060324C) By F.C. O079300100038 (20070712A) EN-SEC and COMMON was added IN SUB001 O079300100039 AND ETA-meson in SUB003 according N.Otsuka remarks. O079300100040 (20070712U) O079300100041 MISC-COL (MISC) Excess energy above reaction threshold. O079300100042 ENDBIB 40 0 O079300100043 COMMON 1 3 O079300100044 E-LVL O079300100045 MEV O079300100046 410. O079300100047 ENDCOMMON 3 0 O079300100048 ENDSUBENT 47 0 O079300199999 SUBENT O0793002 20070605 O028O079300200001 BIB 2 7 O079300200002 REACTION (1-H-1(P,ETA+P)1-H-1,,SIG) O079300200003 ERR-ANALYS (+ERR-SYS) The overall systematical error arises from O079300200004 the detection efficiency determination, the calculationO079300200005 of the luminosity, the uncertainty of the COSY-beam O079300200006 momentum (0.1%) as well as from acceptance corrections O079300200007 (-ERR-SYS) See above. O079300200008 (ERR-S) Statistical error. O079300200009 ENDBIB 7 0 O079300200010 COMMON 1 3 O079300200011 MISC-ERR O079300200012 MEV O079300200013 1. O079300200014 ENDCOMMON 3 0 O079300200015 DATA 6 3 O079300200016 EN DATA ERR-S +ERR-SYS -ERR-SYS MISC O079300200017 MEV NB NB NB NB MEV O079300200018 2526.3 130. 13.8 21.8 24.8 26.5O079300200019 2532.3 174.1 20.2 34.3 45.8 32.5O079300200020 2546.4 314.9 17.3 81.9 116.5 46.6O079300200021 ENDDATA 5 0 O079300200022 ENDSUBENT 21 0 O079300299999 SUBENT O0793003 20070605 O033O079300300001 BIB 3 6 O079300300002 REACTION (1-H-1(P,ETA+P)1-H-1,PAR,DA,ETA) O079300300003 PART-DET (ETA) O079300300004 ERR-ANALYS (DATA-ERR) The quoted errors do not include O079300300005 contributions from overall uncertainties which amount O079300300006 to +24%/-35%. O079300300007 (COS-ERR).Cosine error. O079300300008 ENDBIB 6 0 O079300300009 COMMON 1 3 O079300300010 EN O079300300011 MEV O079300300012 2546.4 O079300300013 ENDCOMMON 3 0 O079300300014 DATA 5 8 O079300300015 COS-CM COS-ERR DATA-CM DATA-ERR MISC O079300300016 NO-DIM NO-DIM NB/SR NB/SR MEV O079300300017 -0.9 0.1 29. 3.9 46.6 O079300300018 -0.7 0.1 23.2 4.7 46.6 O079300300019 -0.5 0.1 22. 6.2 46.6 O079300300020 -0.1 0.3 17.3 5.4 46.6 O079300300021 +0.3 0.1 21.8 4.2 46.6 O079300300022 +0.5 0.1 23.9 3.9 46.6 O079300300023 +0.7 0.1 19.8 3.1 46.6 O079300300024 +0.9 0.1 27.6 3.5 46.6 O079300300025 ENDDATA 10 0 O079300300026 ENDSUBENT 25 0 O079300399999 ENDENTRY 3 0 O079399999999