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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 betweetugrujrp) 6.800 p5hb rnrhj hk;td: qzv k5,4n two nucleons, similar to Eq. 32-4, that could produce a )qb,nj p;hrz058gu :4rvk ht 0kpduhrrt.j6 5$\pi^0$.
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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 tk)qk cmb/h/a2 hat its kinetic energy is much greater than its rest energyh/)/mkaq2c b k ($mc^2$), 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,")srhp2p 88/ rzds+/r5i5ot1zgkg m bl made up of the antiparticles to the constituents of normal atoms, consist of? What might haszidr51/5)torgrhl8z+ 2b8 mk /s p gpppen 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 ele8zg(y h, as0lc xc*p2zctromagnetic 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 amon*bh9.d*ldx + ) facmb4.cfcd kg the decay products of a particle necessarily mean that the decay occurs via the weak interaction? Do all decays via the weak interaction l f.hxa d)cdbd bf*9c+c*.4km 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 2 /rr i.yhver5via the weak interaction even though the neutron and one of its decay products (proton) are str2/i h.5y errvrongly 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, electromag /8us,r5 4*ervlk b ek5vkec2gnetic, weak, gravitational) does an electron take part in? A neutrino? A pe528cb eeks klr5vk v4 *rgu/,roton?
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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 cefvlf j), l886o +mxlconserved in each of the decays in Table 32x 8ec+of8l,ll)m6jv f -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 the electr;j pr unzc2 vm0q6vg(/omagnetic interactij mrq6zc vun20pv;g /(on?
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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 decaysrqhx8/m00i9 pfj v4q a in Table 32-2 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, and why, dzr-t)s 9am:4bm-* sg dsh.vbaoes $\Sigma^0$ 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 decaydd2xjiw- 8odq :lr 5nbnq26,g s in Table 32-4 occur via the electromagnetic interaction?2,j-d 5:rw bdg 68nn2xo dlqqi
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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 decwcq)5oi -a-2zq nfac 4ays 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 massless, had no color charg16d u*; m wxqmghkz0u3ylzh7 3e or electrical charge, and did not feel the weak force. Could you say that this particle k7qwlzh *hmz3 y3;6xug1um0d 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 partic7 dpnrxpk)t trviz5+w gq(,q;/ + lb.mle 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 possiivh l7,*1awq bobh41wble to find particles made up of two quarks and no antiquarks? What about two quarks h h* 4,liq bb7ww1v1aoand 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 wheen.s4 (lz an74 dcvpa. lpp7bat9(o3fn they are inside the nucleus.p3p va4(anate7d pns94zo7b llc f (.?
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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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