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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 produce ai6piixu + t 9ys0xh8p: u8itipxi 0 : yh9+p6xs$\pi^0$.
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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 w), *ixcy; *rgs 6x fy7alxfp5its kinetic energy is much greater than its r xa7x5)crpy s;*f6,wg*ixfl yest 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," mng8w j/fg0p d12s3h whade up of the antiparticles to the constituents of normal atoms, consist of? What might happen if antimatter,g0ph8 3wgf2h/s wj1dn 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 electroma:i m 4q)-yctzznqt *9egnetic 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 parr) 5fft:rhh1bc j; o.mticle necessarily mean that the decay occurs via the weak interaction? Do all decays via the weak interaction hc:) tmf bojhr15.;r fproduce 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 even though the ,e2( 2o*vdwbh3 mfjqgva2+y-,b tcfu neutron and one oef3 uw vbt,-bh j2+ a,fycmdqgo2(2v*f 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 (strong, electroma bgyb1.1f ind7gnetic, weak, gravitational) does an electron take part in? A neutrinn7igf1.dbb 1y o? 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 arwc(pdwl9 ;66+ uurah fe conserved in each of the decays in Table 32-2.+rc wu(pw;6u9a6f hdl
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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 thu e-yr/wv6 12u;rvx 0x5qiqxie electromagnetic interactrr1xxvy2x60;5u-v/we i quiqion?
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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 mqu5 9 iz.fhv: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, doqu1 eb(7 z.pqnes $\Sigma^0$ 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 via th) qn7,/ywfrx*fkt1qmx oaw ;4e electromagnetic interac onq4qfar7wx1 t/fm )wx;y ,*ktion?
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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 thy4 *r2l tdtas0e 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, h/4haoykq e)*vuk ef- 7ad no color charge or electrical charge, and did not feel the weak force. Couaqku47hev-f)k e y o/*ld 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. l5*mh.6rdilp(adu6bf mbm9 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,hw(bge(r ta)xb /:+3sx 5bx oc would it be possible to find particles made up of two quarks and no antiquarks? What about two quar(bae3 x +):bs(txch 5ogr/ xwbks 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 7ndei+ kna,.bthey are free but not when they are inside the nucleus+nb7i k,en.ad ?
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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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