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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, si 4t3itfq / /oe(-rg+ranxzgj4 a8f*nvmilar to Eq. 32-4, that could produce a *(rnt8 /itgo j4xrgvn -3/+fzefqa 4a$\pi^0$.
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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 much ghl1m+3/1) /qhnomphxr kc ehova +e55 reater than its r1m51 o erlh/havnh3x eo)+kpmc/5q + hest 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," 4b4*:h a;mmw yo2nuetmade up of the antiparticles to the constituents of normal atoms, consist of? What might happen if antimatter, made of such o;n *: mewuhbaty442m 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 decu.fhipob .7z; ay signals 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 proso2.60(zvj jnl,; fflga3uq uducts of a particle necessarily mean that the decay occurs via the weak interaction? Do al36vj j0g ;q,zaff(l2sou.un l l 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 interaxv9 kt1*g0 xo::zgaliction even though the neutron and one of itkx*lo9 ai:gz:0 g1 xtvs decay 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 integ9csm:kuwt2 egx , vfm35..pjractions (strong, electromagnetic, weak, gravitational) does an electron take part c3mtpg gu5 f92,vxmj..ekw s: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 cot,c v9095;ayqxiblrdk 6n 0cgnserved in each of the decays in Table 32-2.99bx 0tdi ; l5c6rykc0vaqn, g
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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 electrs6r3hl :strtzk o57)fomagnetic interackfror3s:h6t) sl z7 5ttion?
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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 bb xw6pw8ctxxo:+ 8k4interaction?
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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 ck z,j)wyot3dsy-.*h, 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 Taqk ub :lha6 dvj5 .uf,(wcoe60ble 32-4 occur via the electromagnetic interaction?.qhafk lw, 0j( dcbeuo :6u65v
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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 weakdd2oh-g( 2em5cqo /sx 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 "neutrinolea f9hxb 6c2tv j5pig627rwa .kt" that was massless, had no color charge or electrical charge, and did not feel the weak force. Could you say thachai r2g5.bkapj9w v6x27 6f tt 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 to be bothf:lupn qj.*p p i+.aq5x glv8.nz1j/q
(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 chromodyna sv*cublz)(a t7*1ots mics, would it be possible to find particles made up of two quarks and no antiquarks? What about two quarks and t ts7*a otsv cl(bz)1u*wo 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 deca -ipu;vb8n5r gy when they are free but not when they are inside the nucleus?bvp-;ni u8g 5r
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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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