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习题练习：Elementary Particles
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 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 f.ot(dap.*e0c2w +xkz lgi )uEq. 32-4, that could produce a x.l.(i okeg0+wdac 2)zf *upt$\pi^0$.
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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 kinetic8k*p. jq5fpdy energy is much greater thadk*p.p 85fqyjn 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 antiparticles to the c-8wrok1 0 emdzonstituents of normal atoms, consismd10koz8w-r e t 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 signals the electromagnetic 6 )im+uty;tjq7 ue:id 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 decuiagz) ts7 :m0zfxs3 :ay products of a particle necessarily mean that the decay occurs via the weak interaction? Do all decays via the weak interaction produce a neutrino? a0i)3x tgfzuz: m ss:7Explain.
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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 intel.b dcw5 o1uh8z )qhy(k4 - s07xifdfvraction even though the neutron and one of its decay probqhu f.0xk f1dw8i-y vc4o5l )shd(7z ducts (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 interactqqgr/ro.a3k( ions (strong, electromagnetic, weak, gravitational) does an electron take part in? A neut a rq(.ogk/q3rrino? 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 in2i3mk3kjk- pm each of the decays in Table 32-2 -k 3m3jkpimk2.
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9#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Which of the particle7ncw7b gjsm58 decays in Table 32-2 occur via the electromagnetic interaction?5cm7jbws n g87
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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 32-2ogs-- y7ffis k be:.a7 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, does ;b 409o)wr gh*zieg xw$\Sigma^0$ 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 329f nfchkf/2 2,b.hnyf-4 occur via the electromagnetic interaction?h./hfk9 nf cf2b ,2ynf
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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 occuict)m +(v,bsnuj np/9r 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"om 8j /;n.io+csu;ywwj/m )aa that was massless, had no color charge or electrical charge, and did not fwa;cya8 /oi o)s+m/jm n.;uw jeel 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 partinqze(jssk df0//r-k0m :xef 8 dm, 1jhcle 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 chrnzu 6fj j89t:iomodynamics, would it be possible to find particles made up of two quarks and no antiquarks? What about tw:in8 t juf69zjo 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 whensh, ,+qwte6 v6b sdwj)p/ps.gc w -pb7 they are free but not when they are inside the nucleucg wp w sd6shejsq7ppv+/)w- t,., b6bs?
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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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