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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 nucleonskx+xnk h8q7a mcu: 7d+jz8x y0, similar to Eq. 32-4, that could produce a xhu dxx8cz+ymn j87:0q 7+a kk$\pi^0$.
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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 g q73th1.eeathigh speed, so that its kinetic energy is much greateag 31tehe7q t.r than its rest energy ($mc^2$), 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 antipaos5t2al7v-uk crvu5q37b0mb rticles to the constituents of normal atoms, consist of? What might happen it u 0 b27ck5u-vvs5lr aoq37mbf 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 signaxw r:ea(pwzfaa+f 1ih)o 3*t/l8g s:lls 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 neuo:e.gy 1 s1f.s/ vp emm-ja/dvtrino among the decay products of a particle necessarily mean that thems.e/ aspo/ vm.v1-1 ejd:g fy 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 neutr f +,jp.lj;sgwslh,umo7-s 1 won decays via the weak interaction even though the neutron and one of its decay products (proton) are strongly i+s; h1 gs,l sfw-pu mojl.j,7wnteracting?
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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, gravitational) ds)cv9dr*x:6i (b lqo foes an electron take part in? A neutr6(rsb9v i)xfqlo:* dcino? 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 zl sa ik+6(/nsconserved in each of the decays in Table 3isal+ /(s zkn62-2.
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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 t ykw*tln4xo;r1 4c 1wxhe electromagnetic interactionynkoc l x4w* 11t;xw4r?
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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 by the weak urdv9cw(f5fcp(68b fr 3evn4 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, doe09:onz wkakv;qv57l8p (nfcr s $\Sigma^0$ 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 electroyn 3,kezbv;c5-p 1, hietpj 2omagnetic interaction1v,2hp3 tn ,bijykcpz5;-eeo?
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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 inqm:x3s ahof1,h ho1 ;y 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 "neutriy5x;a:im9 6nrx qi(x bnolet" that was massless, had no color charge or electrical charge, and did not feel the weak f(i9r5ia:b6x qmn x; xyorce. 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 ebr y,im 4l,o: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 quantum chromodynamics, would it be possible to find: ur)l:cz0n ix +vb5ov particles made up of two quarks and n ox+: b)uv0nrzlvc5:i o 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 free but not when they are inside the nuv2x2 ud m1k1xuau k;t5cleua;t5d 1uk2um2 vu xk1xs?
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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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