OBSERVATION OF ENERGETIC DELAYED HADRONS IN AIR SHOWERS - NEW MASSIVE PARTICLES

被引:16
作者
GOODMAN, JA
ELLSWORTH, RW
ITO, AS
MACFALL, JR
SIOHAN, F
STREITMATTER, RE
TONWAR, SC
VISHWANATH, PR
YODH, GB
机构
[1] SUNY-Stony Brook, Stony Brook
[2] Pfizer Corp., Columbia
[3] Nuclear Physics Laboratory, Oxford
[4] Tata Institute of Fundamental Research, Bombay
[5] National Science Foundation, Washington
来源
PHYSICAL REVIEW D | 1979年 / 19卷 / 09期
关键词
D O I
10.1103/PhysRevD.19.2572
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
An experiment to measure the arrival-time distribution of energetic hadrons with respect to air-shower fronts near shower cores was carried out at an altitude of 2900 m. Three events were observed with delays greater than 30 nsec and energies greater than about 45 GeV; these events constitute a fraction of 3.3×10-4 of the events. Estimates of backgrounds and conventional processes failed to provide an interpretation for these events. These events could indicate the production of relatively stable particles with mass 5 GeV/c2. © 1979 The American Physical Society.
引用
收藏
页码:2572 / 2574
页数:3
相关论文
共 20 条
[11]  
GOODMAN JA, 1978, THESIS U MARYLAND
[12]   OBSERVATION OF A DIMUON RESONANCE AT 9.5 GEV IN 400-GEV PROTON-NUCLEUS COLLISIONS [J].
HERB, SW ;
HOM, DC ;
LEDERMAN, LM ;
SENS, JC ;
SNYDER, HD ;
YOH, JK ;
APPEL, JA ;
BROWN, BC ;
BROWN, CN ;
INNES, WR ;
UENO, K ;
YAMANOUCHI, T ;
ITO, AS ;
JOSTLEIN, H ;
KAPLAN, DM ;
KEPHART, RD .
PHYSICAL REVIEW LETTERS, 1977, 39 (05) :252-255
[13]  
HILLAS AM, 1977, 15TH P INT C COSM RA, V8, P460
[14]  
ISGUR N, UNPUBLISHED
[15]  
JOHNSON JR, 7778EXP7100284 FERM
[16]  
JONES LW, 1967, PHYSICAL REVIEW, V164, P1548
[17]  
TONWAR SC, 1977, PRAMANA, V8, P50, DOI 10.1007/BF02872144
[18]   SEARCH FOR MASSIVE INTERACTING PARTICLES NEAR CORES OF EXTENSIVE AIR SHOWERS OF ENERGIES OF ABOUT 2 BY 1014-1016 EV [J].
TONWAR, SC ;
SREEKANTAN, BV ;
NARANAN, S .
JOURNAL OF PHYSICS PART A GENERAL, 1972, 5 (04) :569-+
[19]   SEARCH FOR NEW MASSIVE PARTICLES [J].
VIDAL, R ;
HERB, SW ;
LEDERMAN, LM ;
SNYDER, HD ;
YOH, JK ;
BROWN, CN ;
INNES, WR ;
KEPHART, RD ;
UENO, K ;
YAMANOUCHI, T ;
KAPLAN, DM ;
ITO, AS ;
JOSTLEIN, H ;
SMITH, W .
PHYSICS LETTERS B, 1978, 77 (03) :344-346
[20]   ENERGY CALIBRATION OF A COSMIC-RAY IONIZATION SPECTROMETER [J].
WHITESIDE, H ;
CRANNELL, CJ ;
CRANNELL, H ;
ORMES, JF ;
RYAN, MJ ;
JONES, WV .
NUCLEAR INSTRUMENTS & METHODS, 1973, 109 (02) :375-387