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习题练习:Elementary Particles

 作者: 王信东Wood 发布日期: 2025-10-07 21:48   总分: 21分  得分: _____________

答题人: 游客未登录  开始时间: 10月07日 21:48  切换到: 整卷模式

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1#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Give a reaction between two nu2+i )ei f:-pfmqv;l tvcleons, similar to Eq. 32-4, that could produce a m i-; qfe v2il+tp)v:f$\pi^0$.
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2#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If a proton is moving at very high speed, so that its kinetic energy 6 p.fea79sko iis much greater than its rest energy f6.ik9aoes7p($mc^2$), can it then decay via $p \to n + \pi^+$?  

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3#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
What would an "antiatom," made up of the antiparticles to the ce/ /( x m)tpgw/edafj7cn2dd b8qa:i9 onstituents of normal atoms, consist of? What might happen if antimatter, made of such antiatoms, cibfp d x9g2 87/( jw eca:neq)a/dmd/tame in contact with our normal world of matter?
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4#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
What particle in a decay signals the electromagf.l (8q01fpeutoq *sn netic interaction?
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5#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Does the presence of a neutrino among the decay products of a partikn.*l9-mn cgomd k9r94 lgi s5cle necessarily mean that the decadn-5mcnsgm* g9i9kk 4o . 9llry occurs via the weak interaction? Do all decays via the weak interaction produce a neutrino? Explain.
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6#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Why is it that a neutron decays via the weak interactmigw z,0d0 30z4e 8mfjz;tdop ion even though the neutron and one of its decay products (proton) are strjmz , 04fzm8 ez3g00idpwod;tongly interacting?
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7#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Which of the four interactions (strong, electromagnetic, weak, graviq17 sw uwrg,w1tational) does an electron take part in? A neutrino? A1u 1r7w,wsgqw proton?
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8#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Check that charge and baryon number are conserved in each op17 r9v le;fmvf the decays in Table 32-2 v;9fevrmlp 17.
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9#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Which of the particle decays in Table 32-2 occur via the electromagne ,8zqk3;oidt sn3ce5g tic interact k;qnc5s i e3oz,d3g8tion?
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10#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Which of the particlp.obr 7hs4cn 4e decays in Table 32-2 occur by the weak interaction?
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11#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
By what interaction, and why, doess nop;p57ono 5zbo8f/fu5 m5t $\Sigma^0$ decay to $\Lambda^0 + \gamma$? What about $\Xi^-$ decaying to $\Lambda^0 + \pi^-$?
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12#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
The $\Delta$ baryon has spin $\frac{3}{2}$, baryon number 1, and charge states $Q = +2, +1, 0, -1$. Why is there no charge state $Q = -2$?
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13#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Which of the particle decays in Table 32-4 occur via the electromagnd .eq2 mq:.pkj z6xer.9lfo0detic interactixj :o.d69ep2qzq m0f.lr e.kdon?
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14#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Which of the particle decays in Table 32-4 occur by the weak interaction?xc gl 0nj3hw//qwb8i+6yq 0v cn.9 pgw(ncs2n
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15#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Quarks have spin $\frac{1}{2}$. How do you account for the fact that baryons have spin $\frac{1}{2}$ or $\frac{3}{2}$, and mesons have spin 0 or 1?
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16#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Suppose there were a kind of "neutrinolet" that was massless, had no color chara1b aqyxrql25hd.+1 ugeu qldba5hy 1qr .xa+21 or electrical charge, and did not feel the weak force. Could you say that this particle even exists?
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17#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Is it possible for a particle txdb m4:a:a/v bd2iw 0zo be both
(a) a lepton and a baryon?
(b) a baryon and a hadron? 
(c) a meson and a quark? 
(d) a hadron and a lepton?  
Explain.

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18#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Using the ideas of quantum chromodynamics, would isgjvjs7y do-3w 6eq 4z4/6 inet be possible to find particles made up of two quarks and no antiquarks? What about two qujsg4/zje37i -dqnwyo64 v es6arks and two antiquarks?
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19#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Why do neutrons decay when theyua.pch4czp p0 ir*a5 ( are free but not when they are inside the nucleus?(zppu0 p*arhc.4i5a c
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20#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Is the reaction $e^- + p \to n + \nu_e$ possible? Explain.  

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21#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Occasionally, the $\pi^+$ will decay by the following reaction: $\pi^+ \to e^+ + \nu_e$. Which of the four forces in nature is responsible for this decay? How do you know?
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总分:21分 及格:12.6分 时间:不限时
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