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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 nucf68 or83bl upc uw8ctl(.qk7bleons, similar to Eq. 32-4, that could produce a b p38qc8ut8 fb7w cok.ur6(ll $\pi^0$.
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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 is jw:q q0h/ 2nd9lptlbb28 sp9z much greater than its rest energy 9 2q/ lbl0dp2z:twp q sjhnb89($mc^2$), 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 constituents of n6 7nvk4*tto cdormal atoms, consist of? What might happen if antimatter, made of such antiatoms, came in contact with our normal wo*76k ct tovdn4rld 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 electromagnetic int+m enz,d hda08eraction?
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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 deca, i+vxrd. q(wm t480jntx+j wfy products of a particle necessarily mean that the decay occurs via the weak interaction? Do all decays via the weak interaction produ j0x+mt,+( ifjwnw 4.xr8vqtdce 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 interaction even though the neutro/33 idi(xrgi:7 9oapuracia-n and one of its decay products (proton) are strongly inri:cia9(/3o3i duai7gx pr a- teracting?
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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 interacti1ec94lc -zxwydz5f j2rp,s*zons (strong, electromagnetic, weak, gravitational) does an eljzcr,pedc 4-wz *l 1y5fs2z9 xectron take part 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 conservedc h/x:vz7o/.shaq;arbbsv,y ;x:n o - in each of the decays in Table 32-,s: h v-;.x ;z /haayoc /:nb7oxsbrqv2.
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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 +l)ol/ycd fd)-2 occur via the electromagnetic interacti)cy ld o/)+ldfon?
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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 32k7)di/u uw +fp-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, aumewicf/y.d7 8+ic 3nnd why, 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 decays in Table 32-4 occur via the electromakr )vja 0r+*klgnetic interactar0rk lk +)j*vion?
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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 de-uzu1jpf b* tre ,zhm6385 rk z3fwbp7cays 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 "neutri ,dvo dosl9)befo-,d7kr- .ujnolet" that was massless, had no color charge or electrical charge, and did not feel the weak force. Could you say that this - osvo), kde9lj 7-,dbrou.d fparticle 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 pac9 1/nf- sciovrticle to 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 quanti ) 9,xs fj89wytp9jdqh0t k /noq5gl4um chromodynamics, would it be possible to find particles made up of two quarks and no aj 9ypl,)jk0 i 9 nqt/wdh 5foqxtsg948ntiquarks? 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 free but notpah5w2w8a o1hj;h vyrq k)q/- when they are inside the nucleuhjw) haka5 2p;rv y8qo1/-hwqs?
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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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