K short to mu mu branching ration

[akshaykatre]

Hi everyone,

Could anyone please tell me if the branching ratio of Ks -> mu mu been experimentally observed and noted? I looked at the PDG value, and I'm trying to find papers where I can find the source of the same.

Also, I'm not entirely sure if there has been an experiment to measure its value (I'm just assuming there is!), and maybe its just a calculated value.

If anyone has any information about this branching ratio - papers, observed value, how to calculate its value - anything... it would really be appreciated!

Thank you in advance

Cheers,
Akshay

 

[Bill_K]

The PDG data says < 3.2 × 10⁻⁷, which would indicate it was looked for experimentally and not found, with references PL B619 61 F. Ambrosino et al. and PL 44B 217 S. Gjesdal et al. Anything useful there?

 

[Vanadium 50]

Go to the PDG. Find the particle listing for K-short. Look for that decay (it's number 11). Go to that section, and you will see two short references, one by Gjesdal and one by Hyams. Then go all the way to the bottom where you will find the full references.

 

[akshaykatre]

Hey Bill_K,

Firstly, thanks so much for the quick reply..
Actually I didn't know how to read the references.. but thanks so much, I did find the papers but have to read through them still... Hopefully it'll have what I'm looking for...
And when you say it was looked for experimentally and not found... you mean they didn't find a precise value for this branching ratio, correct?!
Also if you can, could you please tell me how you spotted the exact references from the PDG? I don't know how to do it.. and it will be very handy thing to know..

 

[akshaykatre]

Hi Vanadium 50,

I guess I was writing the earlier reply when you messaged... thanks so much!
But I can't seem to find the correct references when I do that..
I go to equation 11 of Ks to mumu ratio, then i scroll down and see this : 11 This result combines AMBROSINO 06C KLOE 2001-02 data with ALOISIO 02B KLOE
2000 data. K0
S → π+ π− fully inclusiv

correct?
but 06C and 02B are different papers, at least from the ones Bill_K referred to..
Am I doing something wrong?

Thanks once again!
Cheers

 

[Vanadium 50]

You need to read what I wrote more carefully.

"LOOK FOR THAT DECAY."

 

[akshaykatre]

Thanks so much! Yeah I wasn't looking in the right place!
I found what I wanted! :) Thanks so much guys!