K short to mu mu branching ration

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Discussion Overview

The discussion centers around the experimental observation and measurement of the branching ratio for the decay of K-short (Ks) to muon pairs (mu mu). Participants are seeking information on whether this branching ratio has been experimentally observed, the sources of such information, and how to interpret related references.

Discussion Character

  • Exploratory, Technical explanation, Homework-related

Main Points Raised

  • Akshay inquires about the experimental observation of the branching ratio for Ks -> mu mu and seeks papers for reference.
  • One participant cites the PDG data indicating a branching ratio of < 3.2 × 10−7, suggesting that it has been searched for experimentally but not observed.
  • Another participant provides guidance on locating references in the PDG related to the decay of K-short.
  • Akshay expresses confusion about the references and seeks clarification on how to find the correct papers.
  • There is a clarification that the experimental search did not yield a precise value for the branching ratio.
  • Participants discuss the specific references and data sources related to the decay process.
  • Akshay eventually finds the information sought after some guidance from other participants.

Areas of Agreement / Disagreement

Participants generally agree that the branching ratio has not been experimentally observed, but there is some confusion regarding the specific references and how to interpret them. The discussion remains somewhat unresolved regarding the exact details of the references and their implications.

Contextual Notes

There are limitations in the clarity of the references discussed, and participants express uncertainty about how to navigate the PDG data effectively. The discussion also highlights the need for careful reading of the provided information.

akshaykatre
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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
 
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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?
 
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.
 
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..
 
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
 
You need to read what I wrote more carefully.

"LOOK FOR THAT DECAY."
 
Thanks so much! Yeah I wasn't looking in the right place!
I found what I wanted! :) Thanks so much guys!
 

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