- #1
ChrisVer
Gold Member
- 3,378
- 464
Hi I have some question...I want to find what fraction of some produced ##D_s^\pm## to decay into ##\tau##'s.
I was looking around the pdg and I came across something that confused me.
Here:
http://pdg.lbl.gov/2014/listings/rpp2014-list-Ds-plus-minus.pdf
on page 4 it lists the semileptonic decays, and an example for the ratio to muons it gives: ##Br(D_s^\pm \rightarrow \mu^\pm \nu_\mu)=(5.56 \pm 0.25)~ \times 10^{-3}##
However in this:
http://pdg.lbl.gov/2006/reviews/dsdecaycons_s034310.pdf
Equation (2) gives a totally different Branching ratio...
##Br(D_s^\pm \rightarrow \mu^\pm \nu_\mu)=0.0074\pm 0.0013= (7.4 \pm 1.3) \times 10^{-3}##
Why is this happening? (or what am I reading wrong?)
I was looking around the pdg and I came across something that confused me.
Here:
http://pdg.lbl.gov/2014/listings/rpp2014-list-Ds-plus-minus.pdf
on page 4 it lists the semileptonic decays, and an example for the ratio to muons it gives: ##Br(D_s^\pm \rightarrow \mu^\pm \nu_\mu)=(5.56 \pm 0.25)~ \times 10^{-3}##
However in this:
http://pdg.lbl.gov/2006/reviews/dsdecaycons_s034310.pdf
Equation (2) gives a totally different Branching ratio...
##Br(D_s^\pm \rightarrow \mu^\pm \nu_\mu)=0.0074\pm 0.0013= (7.4 \pm 1.3) \times 10^{-3}##
Why is this happening? (or what am I reading wrong?)