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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;8i50q xkxh0xb u.mah3mngg4 Eq. 32-4, that could produce a m5ggk8;xqhnhu40xmx .0i3 ba$\pi^0$.
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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 rkfimdgm+ 9spe/7j;e m-+ovs- yf30 v very high speed, so that its kinetic energy is much greateem ko 3sp7gj0ifd9ev+v -+smfr;-y/mr 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 constituent,arc+c0ui p)rtt 0 hze8(ajc: /bbs5z s of normal atomt+ azh cpsb )zu, 0ab(/rtc:5re8ji 0cs, 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 eja /1rj l5+c(ofpgi q)lectromagnetic 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 products of a p;b miku o:9e ty7co0,o vj/r1aarticle necessarily mean that the decaybo1i ;u ar vk, /7etm:90ojcyo 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 neutron decays via the weak interaction eve.+dkabq;l 6gho(z /jbn though the neutron and one of its decay products (proton) are strongly lh jb/ba(+o gqdkz6.;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, electromagnetic, wawdp9/- zn 3z r *,wmzlfst5q-eak, gravitational) does an electw3lzrmqn/tw*zszdp - 9f,a5- ron 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 are conserved in each gh47ig-glv k193lucmof the decays in Table m-hivgl7 1kgl 4g3 9uc32-2.
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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 decd)p3y to/r7 tmab 5at5ays in Table 32-2 occur via the electromagnetic interactitp5 ot)b57 dma3r/t ayon?
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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 /gcwum k ip2.1b4. v1nko bay.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, doe* .a) b0(mqyetllb ie+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 i:udsbjs9 (vvf,.3y p jn Table 32-4 occur via the electromagnetic interactij b(ysv, j:u3pdfsv.9on?
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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 weak interaction?j 25.ni 8ty agpu gdb0dq6+xb3
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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 "neutrieo u3n4kv 9ejt968v mv8wr x/ck: lwv7nolet" that was massless, had no color charge or electricalte4wjuxrv:o/ k78 vk el8 9vmn9cwv63 charge, and did not feel 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 particle to be bothz1d q 8s8pdqjx mf :iz.ufh)61
(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 cu/i2n7s rpz6to find particles made up of two quarks andpr672iz c /uns no 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 bu.v6q uyyr :w: +o7br7tmw dgcw5us9-xt not when they are inside the nucleu s7 myu-.:6o wrwu+5 xvb gryw79qt:dcs?
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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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