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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(e)tj1ileedb.lnk+x8: wm s. to Eq. 32-4, that could produce a bwse. i8k jde1x.l (:nle)+tm$\pi^0$.
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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 kineus0 pr1yx1/hhtic energy is much grea/pxu rsy011 hhter 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,"-p-sx 1nr1dsq made up of the antiparticles to the constituents of normal atoms, consist of? What might happen if antimatter, madess-qx- n1r 1dp 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 e)rt9nbhmy o- ,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 producdhedhirzts0 m(yx3 /8f* 46rg. r)qerts of a particle necessarily tm x3r.h)iqd/ sg0h8re*dr fyrz e64(mean that the decay 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 even thx(fr p:gk.1 oiough the neutron and one of its decay products (proton) are strongly interactinixf o kgp.:1r(g?
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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 int6wsfhs ux qo. ;)k5cp,eractions (strong, electromagnetic, weak, gravitational) does an electron take part inqfsw5ku 6;cohpx) ., s? 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 conserv)fnql52 +c/vp lz ht sg1nj6 2a;;zmswed in each of the decays in Table 32-25;jc;lng v/2pm+fz6 1ltna2hsws )zq.
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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 decaykvi6u-kk* r m4 :dq 1b;tpf*njs in Table 32-2 occur via the electromagnetic interact:fb;jdpkr6qi1uv4 n-k* tkm*ion?
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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 ( uc: y0o8ut x fe1uo5)khbaa4decays 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, anffqidz,.(g91t 8wqtpd why, 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 Table 326,gse;qtwd jc9m1j:nq0wj iz*;2scc 6xv0 wm-4 occur via the electromagnetic interacc; vc:i 6910w ztjw;06eqc 2sxsm,jwq*njgd mtion?
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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 qv-es( l;(u j: hh)iyjhl 8y/sr mg*6tby 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 wfi6x,j1zofuz+ ,0 qxahs6ut 6as massless, had no color charge or electrical charge, and did not feel the weak fo6fz6oaitx+0u1s ,jxf,u hz6 qrce. 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 bom1 -kw(cwxx q3th
(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 *hn;ga*wu2rb cyqlb yl-g67+be possible to find particles made up of two quarks and no au+b* cy lrwaghg;lb 2n7*y6q-ntiquarks? 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 but not when they are inside / m*. 9lil i2twxzcgcqj9-n.vthe nucleus xqzg -ll imj/c*v2it.wc9n.9?
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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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