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WWWW.lattice.com

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Title: Author: liuchuan Last modified by: liuchuan Created Date: 4/6/2005 1:08:48 AM Document presentation format: Company – PowerPoint PPT presentation

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Title: WWWW.lattice.com


1
??????
  • ??????
  • ?????????
  • ??

2
??????
3
WWWW.lattice.com
  • What
  • ??????(???)??????,?????????
  • Why
  • ?????????????,???????????????
  • Who
  • K. G. Wilson ??????
  • Where
  • ?????????

4
??????
  • ?????????????
  • ??????? ??
  • ????????? ??
  • ???????

5
??
  • ?????????
  • ?????????????
  • ??????? ??
  • ????????? ??
  • ???????????
  • ????(path integral)?
  • ????(Monte Carlo)?
  • ????????,Higgs??,QCD
  • ????

6
?????????????
7
God-given units
  • ???????
  • ??????,??????,???????,????????
  • ????????(??)-1
  • ??????????? (??)1

8
??
  • ?????? 1010ly1018 m
  • ?????? 103 -100 m
  • ???? ?? 10-9 -10-8 m
  • ?? 10-10 -???
  • ???? 10-10 m
  • ??? 10-15 m
  • ???? 10-19 m

37???!
9
??
  • ???
  • ??(e, m , t ???????)
  • ??(u, d, c, s, t, b)
  • ????????
  • g,W?,Z0,g
  • Higgs(???)

10
????
  • ????
  • ??
  • ??
  • ?
  • ?

11
?????
  • ????
  • ????????????
  • ??????(standard model)
  • ???????
  • ????????
  • ????
  • ???????Theory of Everything

12
Two Standard Models
???????? ???????????????????
??????? ???????
13
Two models married
?????,
?????
????
?????
??
????
14
????????
???? ? ??/????? ??????
???? ? ??/????? ??????
? ? ????
Theory of Something
15
????
????????????????
  • S0 ??? ? ???
  • S1 ??? ? ???(???)
  • S1/2 ??? ? ???
  • ????????
  • ?????????????????
  • ?????????
  • ????????????????????

16
?????????????
  • ????????
  • ?????????????
  • ?????????
  • ?????
  • ???? gtgt ??????
  • ??????
  • ??????
  • ??????

17
?????????
  • ?????Sf ( x) l
  • ??????f ( x)
  • ???? l
  • ??????????? l0
  • ????????????
  • ???????? l ????
  • ?????(??????l )

18
???????
??
???
???
???
????
19
???????
k ??????
????
?????
?????????
20
???????
  • ???????,??????

21
???????I
??
???
???
???
????????
22
????
  • ???
  • ?????,?? k ??
  • ???
  • ????????????

23
???????II
???????????
??
????????!
24
????
  • ????????
  • ????????

????
25
??????
  • ??????(???)??????,?????????
  • ????????
  • ?????????????,?????????????
  • ????????????????(???????????)
  • ??????(Monte Carlo)??

26
??
????????
????
????????
????????
??????
27
?????????????
28
?????????
  • ??????-?-???4?????????(???)?????
  • ?????Sf ???(?)??
  • ??????????

????/????
(??)????
Boltzmann??
29
????/???????
  • ????????????

??????
30
??????
31
?????????
  • ??????????????????(??????)
  • ????????(???),?
  • ???????????????
  • ???????
  • ??????(Monte Carlo??)

32
Monte Carlo??
  • ????????
  • ??Markov??
  • ?????????
  • Markov ??
  • ??????
  • ????

33
?? Lenz-Ising model
  • ??????????Z2???
  • Ising????????????????(?????lf4???),?????????????Z
    2???
  • Universality

34
Monte Carlo?? Ising model???
  • ?????PC
  • ??(?300-400?)?????(??)
  • ?????Random generator
  • ?????????
  • ??????Ising??????????,?????70-80?????RG??(?e-expan
    sion?)

35
??Higgs????
  • ??O(4)????lf4??
  • Triviality ? 4? lf4 ?marginal operator
  • ???????,l????????????,?????a????,???Higgs??????
  • Higgs??????600-700GeV

36
????
  • ??????????,????????(??????p??,K???),?????
  • ????-??????????????
  • ????????(Lattice QCD)??????QCD?????????

37
?????
  • mp938.27MeV (uud)
  • mn939.56563MeV (udd)
  • mp139.56995MeV (ud, ud)
  • mK493.677MeV (us, us)
  • ????????????????????????????
  • Lattice QCD???????????????

38
??????????
  • Lattice QCD??????????????(????)???????(??????????)
    ????
  • ???QCD??????,???(lie)?????????????,?????(J PC
    0)???1.7GeV??
  • ???(hybrids)???-???-????????(?????)
  • ???????????????

39
???????
40
?????
  • ????????????????????????
  • ????????Monte Carlo??????????????
  • ??20???Growing pain,?????????,??????
  • ????????

41
?????
  • ??????(??)???
  • ?????????????????-???????????
  • ???????
  • QCD ??quenching vs. unquenching
  • ????????complex actions?
  • ?????(chiral fermions)??????????,?????????.

42
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