ENTRY K2544 20220621 K021K254400000001 SUBENT K2544001 20220621 K021K254400100001 BIB 11 31 K254400100002 TITLE First measurement of coherent double neutral-pion K254400100003 photoproduction on the deuteron at incident energies K254400100004 below 0.9 GeV K254400100005 AUTHOR (T.Ishikawa, H.Fujimura, H.Fukasawa, R.Hashimoto, Q.He,K254400100006 Y.Honda, T.Iwata, S.Kaida, H.Kanda, J.Kasagi, K254400100007 A.Kawano, S.Kuwasaki, K.Maeda, S.Masumoto, M.Miyabe, K254400100008 F.Miyahara, K.Mochizuki, N.Muramatsu, A.Nakamura, K254400100009 K.Nawa, S.Ogushi, Y.Okada, K.Okamura, Y.Onodera, K254400100010 K.Ozawa, Y.Sakamoto, M.Sato, H.Shimizu, H.Sugai, K254400100011 K.Suzuki, Y.Tajima, Y.Taniguchi, Y.Tsuchikawa, K254400100012 H.Yamazaki, R.Yamazaki, H.Y.Yoshida) K254400100013 INSTITUTE (2JPNTOH,2JPNYMG,2JPNTOK,2JPNKEK) K254400100014 (2JPNJPN) Tohoku Gakuin University, Sendai K254400100015 REFERENCE (J,PL/B,772,398,2017) K254400100016 PART-DET (G,D) K254400100017 INC-SOURCE (TAGD) with a carbon fiber from the 0.93 GeV K254400100018 circulating electrons K254400100019 SAMPLE - Chemical-form of target is element. K254400100020 - Physical-form of target is liquid. K254400100021 - Target-thickness: 45.9 mm K254400100022 METHOD (COINC) Detection of a deuteron and two neutral pions K254400100023 in coincidence. K254400100024 FACILITY (SYNCH,2JPNTOH) STretcher Booster (STB) ring at K254400100025 Research Center for Electron Photon K254400100026 Science K254400100027 DETECTOR (CSICR,CEREN,SCIN) An electromagnetic (EM) calorimeter K254400100028 complex, FOREST K254400100029 (SCIN) plastic scintillators used for charged particle K254400100030 HISTORY (20180525C) Ichiko K254400100031 (20180531R) Data received from Takatsugu Ishikawa by K254400100032 an email K254400100033 ENDBIB 31 0 K254400100034 NOCOMMON 0 0 K254400100035 ENDSUBENT 34 0 K254400199999 SUBENT K2544002 20220621 K021K254400200001 BIB 3 4 K254400200002 REACTION (1-H-2(G,2PI0)1-H-2,,SIG) K254400200003 ERR-ANALYS (ERR-SYS) Total systematic uncertainty K254400200004 (ERR-S) Statistical uncertainty K254400200005 STATUS (TABLE) Fig.4 of Phys.Lett. B772(2017)398 K254400200006 ENDBIB 4 0 K254400200007 NOCOMMON 0 0 K254400200008 DATA 6 16 K254400200009 EN +EN-ERR -EN-ERR DATA ERR-S ERR-SYS K254400200010 MEV MEV MEV MICRO-B MICRO-B MICRO-B K254400200011 867.8 17.6 16.5 0.068 0.009 0.006K254400200012 836.2 12.7 14.1 0.037 0.007 0.004K254400200013 810.6 12.2 12.5 0.049 0.008 0.004K254400200014 789.5 10.9 6.2 0.063 0.013 0.007K254400200015 770.8 5.4 4.2 0.040 0.011 0.006K254400200016 759.9 4.9 4.3 0.058 0.014 0.007K254400200017 746.1 5.4 5.3 0.055 0.013 0.006K254400200018 734.0 5.2 5.1 0.079 0.014 0.009K254400200019 717.9 6.3 5.7 0.067 0.012 0.007K254400200020 702.6 5.8 5.9 0.063 0.011 0.006K254400200021 683.4 6.5 7.0 0.061 0.010 0.006K254400200022 667.0 6.4 6.9 0.059 0.010 0.006K254400200023 646.6 7.4 9.0 0.051 0.009 0.005K254400200024 626.7 6.4 6.6 0.047 0.012 0.006K254400200025 607.8 8.4 8.6 0.031 0.007 0.004K254400200026 583.7 8.7 8.7 0.041 0.008 0.005K254400200027 ENDDATA 18 0 K254400200028 ENDSUBENT 27 0 K254400299999 ENDENTRY 2 0 K254499999999