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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, similar to Eq. 32-4, that could produ)(+cldyn al (muju:j:7vz i g8ce a i: 7d+ )jv(uy la(jglmzun:c 8$\pi^0$.
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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 lk;r+ 64r q,oh6dw nhwenergy is much greaterw h 4+w6rork,6nhdl ;q 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 antiparticles to the constithmwe 1z202yy 7ewaua) uents of normal atoms07m)hw1zu w2 eay ey2a, consist 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 interactiob3m;r p y) zp4alke1nu6h17man?
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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 the4.9urtcqj21 c0be ase decay products of a particle necessarily mean that the decay occurs via the weak interaction? Do all decays via the weak i c.sc91tee 4ua 0j2rqbnteraction 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 inte dfhvgwy7 s;vk4ts5r)e- m(6vraction even though the neutron and one t5vy64degs 7;s(h k)wr- vvfmof its 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 interactions (sts -gon: kbe6,frong, electromagnetic, weak, gravitational) does an electrns:- bekgf,6 oon 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 ar3dl* p*(f tzsb+jlm -xe conserved in each of the decays in Table 32b+*p t x*l(s3zj- dflm-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 vbi q h5 .totxo8/9jur5ia the electromagnetic interaction55iq8t /huojox. tr9b?
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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 inuk/x5./ xi zb+6kf:v:icelxv teraction?
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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 ka r 56z6*/z5us9utujmk k+kc $\Sigma^0$ 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 vi45rsg+p6cyuzo-9.jojjh kj t9 h+.je a the electromagnetic interacrjk9-j zs5th.ho jc 4 69g+.+pujyo jetion?
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14#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Which of the particlewm v 8nliq d3p5b3tt,4 decays 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,a n)ga)wokc-oc,,5 iy had no color charge or electrical charge, and did not feel the weak force. Could you ,i) 5 ko)ywan,cca-o gsay 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 pa 6hs/dg,ap1dt 0fc9 rsrticle 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 d9ciq;gz72/u3z s vuzfind particles made up of two quarks and no ant 27z3c 9;sdgvuzzu qi/iquarks? 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 freosnze: du6z*.e but not when they are inside the nucleus?u: .n6dz sze*o
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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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