t*****n
发帖数: 225 | 1 在wiki上查Higgs boson这一页
以前有这样一段（8月4号以前）
Precision measurements of electroweak observables indicate that the Standard
Model Higgs boson mass has an upper bound of 144 GeV/c2 at the 95%
confidence level[7] as of March 2007 (incorporating an updated measurement
of the top quark and W boson masses).
7."Tevatron collider yields new results on subatomic matter, forces"
http://www.fnal.gov/pub/presspass/press_releases/tevatronresults.html
后来又改成这个样子了
Precision measurements of electroweak observables indic |
C********n
发帖数: 6682 | 2 用的model不一样吧
Standard
Standard
【在 t*****n 的大作中提到】
: 在wiki上查Higgs boson这一页
: 以前有这样一段（8月4号以前）
: Precision measurements of electroweak observables indicate that the Standard
: Model Higgs boson mass has an upper bound of 144 GeV/c2 at the 95%
: confidence level[7] as of March 2007 (incorporating an updated measurement
: of the top quark and W boson masses).
: 7."Tevatron collider yields new results on subatomic matter, forces"
: http://www.fnal.gov/pub/presspass/press_releases/tevatronresults.html
: 后来又改成这个样子了
: Precision measurements of electroweak observables indic
|
x********g
发帖数: 595 | 3 Citing"Their results indicate that Fermilab researchers have for the first
time excluded, with 95 percent probability, a mass for the Higgs of 170 GeV."
Experimentally "excluded the particular value 170Gev", NOT " excluded the
values >= 170Gev".
Some physicists claimed http://arxiv.org/abs/hep-th/0610241 in their THEORY that the Higgs was around 170Gev. Now it's EXPERIMENTALLY excluded by Fermilab. That's it.
Standard
Standard
【在 t*****n 的大作中提到】
: 在wiki上查Higgs boson这一页
: 以前有这样一段（8月4号以前）
: Precision measurements of electroweak observables indicate that the Standard
: Model Higgs boson mass has an upper bound of 144 GeV/c2 at the 95%
: confidence level[7] as of March 2007 (incorporating an updated measurement
: of the top quark and W boson masses).
: 7."Tevatron collider yields new results on subatomic matter, forces"
: http://www.fnal.gov/pub/presspass/press_releases/tevatronresults.html
: 后来又改成这个样子了
: Precision measurements of electroweak observables indic
|
e******g
发帖数: 75 | 4 Higgs的质量的limit可以分两种，直接的和间接的，两者都要有一个假设，就是
Standard Model Higgs。直接的，也就是说,直接撞出Higgs,并且寻找它decay的产物。
在Tevatron以前，唯一的这样的bound来自LEP, >114GeV.前面这个170GeV的是Tevatron
的最新结果，就像xiongxiong所说，只是170附近的Higgs被rule out. 但它的质量可以
更高，也可以更低。但是，wiki上说这个是“Precision measurements of
electroweak observables indicate”是不对的，这牵扯到第二种bound,从所谓的
electroweak precision measurements得到，也就是所谓的间接的limit. 这种limit存
在是因为很多物理量测量得很精确，以至于从Higgs圈图的修正都不可忽略，而这种修
正是和Higgs的质量相关的，所以Higgs的质量不能太大，一般来说大约上限在200GeV左
右，前面的144GeV我觉得有点太乐观，不用太在意。
以上所说的是再假定st |
c****e
发帖数: 2097 | 5 the abstract is very provoking. the content very confusing.
GeV."
【在 x********g 的大作中提到】
: Citing"Their results indicate that Fermilab researchers have for the first
: time excluded, with 95 percent probability, a mass for the Higgs of 170 GeV."
: Experimentally "excluded the particular value 170Gev", NOT " excluded the
: values >= 170Gev".
: Some physicists claimed http://arxiv.org/abs/hep-th/0610241 in their THEORY that the Higgs was around 170Gev. Now it's EXPERIMENTALLY excluded by Fermilab. That's it.
:
: Standard
: Standard
|
x********g
发帖数: 595 | 6 Hehe, no wonder it's excluded.
【在 c****e 的大作中提到】
: the abstract is very provoking. the content very confusing.
:
: GeV."
|
t*****n
发帖数: 225 | 7 thanks a lot. Those guys who edit this entry on wiki seem not so
professional.
You really should contribute to this entry.
Tevatron
【在 e******g 的大作中提到】
: Higgs的质量的limit可以分两种，直接的和间接的，两者都要有一个假设，就是
: Standard Model Higgs。直接的，也就是说,直接撞出Higgs,并且寻找它decay的产物。
: 在Tevatron以前，唯一的这样的bound来自LEP, >114GeV.前面这个170GeV的是Tevatron
: 的最新结果，就像xiongxiong所说，只是170附近的Higgs被rule out. 但它的质量可以
: 更高，也可以更低。但是，wiki上说这个是“Precision measurements of
: electroweak observables indicate”是不对的，这牵扯到第二种bound,从所谓的
: electroweak precision measurements得到，也就是所谓的间接的limit. 这种limit存
: 在是因为很多物理量测量得很精确，以至于从Higgs圈图的修正都不可忽略，而这种修
: 正是和Higgs的质量相关的，所以Higgs的质量不能太大，一般来说大约上限在200GeV左
: 右，前面的144GeV我觉得有点太乐观，不用太在意。
|
T*********r
发帖数: 11175 | 8 echosong前两月好像刚写过一precision EW test的review
去arxiv上找找
【在 t*****n 的大作中提到】
: thanks a lot. Those guys who edit this entry on wiki seem not so
: professional.
: You really should contribute to this entry.
:
: Tevatron
|
x***u
发帖数: 6421 | |
