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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 nucleons, similar to Eq. 32-4, that could prod m. bii;qib+-/5wptwppnuv2 ) lg 5:viuce a v/5 )i;uvp-wb 5bwit:lqni 2pgmi.+p $\pi^0$.
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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 iz::;x8vq qu sat very high speed, so that its kinetic energy is much greater than its rest energy (xizu;s:v: qq8$mc^2$), 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 antiparticl d 0do*s:bwr ;ua4qg*ni 8zm1res to the constituents of normal atoms, cons is;dmq *r 14z:u gnwdor8*a0bist of? What might happen if antimatter, made of such antiatoms, came 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 sigmj4 xu3nou,u7nals the electromagnetic 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 tfw)kt.x :r*z of a particle necessarily x* wz.)rtkft:mean that the decay 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,z w jdkn0excz6,:a3x via the weak interaction even though the neutron and one of its djzczwdkx, 3xe :n0a ,6ecay products (proton) are strongly 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, el6;l w z);mctoyectromagnetic, weak, gravitational) does an electron take pa; cl)mwyo;6tzrt in? A neutrino? A 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 of the decayvll0 .c v7unexi2 .g,gs in Table 32-2.xcu 0vvi. g72l.nleg,
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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 decauk5 9cw) v1p-ixl )fspys in Table 32-2 occur via the electromagnetic interaccf wl- xuv)p51ips )9ktion?
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10#
 
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 bbm i j9mgae5i 0wbnl-//t)8u1tfp va,y 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 w;q3-tevy93 x ife)zdahy, does $\Sigma^0$ 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 decay g,r +./d0of3l4jce gfqu- dcoe:izm q el1k58s in Table 32-4 occur via the electromagnetic interactiojc4 m/u5qf cgo1fe lq+:ko8de z.3 ,ri-de0lg n?
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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 84ze7j0od0gcmr ui/uxgk 8,m in Table 32-4 occur by the weak interaction?
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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 masslesssq6s q1vz0erun h68t:, had no color charge or electrical charge, and did not feel the weak force. Coul:1 sh 6q6r08suqtzvend 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 - anqdek m lo5ycs4 h,* 13hh3g)ka,gzto 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 chrojxoatkdpo ,j77v /bdw *ypiy9gh)*+;fc j r3-modynamics, would it be possible to find particles madeda;k*-+7 7ivox/,jp g)p rdwfo9th yyj *j cb3 up of two quarks and no antiquarks? What about two quarks 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 they are free0(v.qlk)n4 ak0 moz eq but not when they are inside the nucleus?ok ae q(.04lqm)0nz vk
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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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