Re: mass definition in particle physics

Article View: sci.physics

Article #1193

#1193

From: SCOTT I CHASE
Date: Tue, 14 Apr 1992 19:01

21 lines
1445 bytes

In article <1992Apr14.024815.14039@cco.caltech.edu>, brahm@cco.caltech.edu (David E. Brahm) writes...

>Of the Standard Model's 19 free parameters, most are
>related to masses:
>  9 quark and lepton masses (top mass still unknown)
>  4 CKM matrix parameters (3 angles, 1 phase), related to quark masses
>  2 Higgs parameters: vev is known, Higgs mass is unknown
>  3 gauge couplings
>  1 Theta_QCD = 0 but nobody's sure why
> 

Although not strictly part of the Standard Model, we should also add to this
list:
   3 neutrino masses
   3 neutrino mixing angles 

I don't know what name we should give to the Standard Model when you allow 
for neutrino mass.  Probably just "Standard Model" all over again.  But
most people allow for this possibility today.  

-Scott

Technical Details

Message-ID: <22704@dog.ee.lbl.gov>

Path:

arc1-ca.pugleaf.net!sparky!uunet!zaphod.mps.ohio-state.edu!magnus.acs.ohio-state.edu!usenet.ins.cwru.edu!agate!dog.ee.lbl.gov!csa2.lbl.gov!sichase

References: <10APR199210204620@deimos.ucc.umass.edu> <1992Apr14.024815.14039@cco.caltech.edu>

Show Full Headers

Complete Article Headers

Path: arc1-ca.pugleaf.net!sparky!uunet!zaphod.mps.ohio-state.edu!magnus.acs.ohio-state.edu!usenet.ins.cwru.edu!agate!dog.ee.lbl.gov!csa2.lbl.gov!sichase
From: sichase@csa2.lbl.gov (SCOTT I CHASE)
Newsgroups: sci.physics
Subject: Re: mass definition in particle physics
Date: 14 Apr 92 19:01:00 GMT
Organization: Lawrence Berkeley Laboratory - Berkeley, CA, USA
Lines: 23
Distribution: na
Message-ID: <22704@dog.ee.lbl.gov>
References: <10APR199210204620@deimos.ucc.umass.edu> <1992Apr14.024815.14039@cco.caltech.edu>
Reply-To: sichase@csa2.lbl.gov
NNTP-Posting-Host: 128.3.254.197
Summary: No theory predicts fermion masses
News-Software: VAX/VMS VNEWS 1.3-4

Reply to Parent Message