1991 Fiscal Year Final Research Report Summary
The investigation of hadronic final state in high energy neutrino emulsion reaction
| Project/Area Number |
01540243
|
|---|
| Research Category |
Grant-in-Aid for General Scientific Research (C)
|
| Allocation Type | Single-year Grants |
|---|
| Research Field |
核・宇宙線・素粒子
|
|---|
| Research Institution | Aichi University of Education |
|---|
Principal Investigator |
USHIDA Noriyuki Aichi University of Education, 教育学部, 教授 (70024049)
|
|---|
| Project Period (FY) |
1989 – 1990
|
| Keywords | Neutrino Charged Current Interaction / Grey Track Particles / Hadronic Mass W / KNO Scaling / Cumulative Prothon / Cumulative Effect / Nudlear Scaling / Reinteraction Model |
|---|
| Research Abstract |
Multiplicity, angular and energy characteristics of secondary particles produced in the charged current inelastic interactins of neuntrinos with emulsion nuclei, were investigated. The average number of grey and black track particles are nearly indpendent on the incident neutrino energy whereas the average number of showers increases slowly with it. The ratio of events with zero grey track muliplicity in neutrino emulsion and proton-emulsion is 0.48<plus-minus> 0.06 and 0.27<plus-minus>0.02 respectively. It has been shown that recoiling nucleons (grey track) determines the excitation energy in the hit nucleus and this excitation is independent of the number and nature of produced particles. Both space and azumuthal angular distributions of grey tracks has an enhancement at 180ﾟ which is the opposite direction of the emitted m
A cumulative effect in interactions of neutrino with emulsion nuclei in 10-200 GeV was investigated. Energy spectrum slope parameter of cumulative protons was measured to be T_<delta>=47.0<plus-minus>5.0 MeV, which is in a good agreement with the results of other (anti) neutrino and hadron experiments. A dependence power index of relative mean yield of cumulative protons was found to be a=0.68<plus-minus>0.12 for a range 20-80.
The mean yields of cumulative proton are nearly independent on the four momentum square Q^2 and neutrino energy E_<upsilon>. The backward proton (cumulative proton) events also exhibit features expected from several reinteractions, Because the more forward protons there are, the more backward protons are produced.
|
Research Products
(4 results)
