Hadrons with significant branching ratios to muons

[Eric Culbertson]

Hi, I'm undergraduate researcher and my professor is interested in the answer to this question. He's kind of left me in the dark on why this is important to us, but that is another matter.

We want hadrons that are produced at LHC conditions and decay before reaching the detector. So far all I've found is K⁰ _long, but that particle is a little too stable for our needs.

 

[Gigaz]

You may be able to find what you're looking for on the wikipedia:

https://en.wikipedia.org/wiki/List_of_baryons
https://en.wikipedia.org/wiki/List_of_mesons

 

[dukwon]

Just muons? Muons plus something else?
The branching fraction of $J/\psi \to \mu^+ \mu^-$ is 6%. These are produced in copious amounts at the LHC.
The authoritative source is the PDG: http://pdglive.lbl.gov/Viewer.action
A more searchable, but less complete, source is the database for the LHCb simulation:
http://svnweb.cern.ch/world/wsvn/lhcb/DBASE/trunk/Gen/DecFiles/dkfiles/DECAY.DEC

 

[mfb]

In addition to the raw number of muons, the muon energy is probably interesting. As an example, if you study hadron decays at LHCb then muons with 2 GeV will be interesting - they are produced in large amounts from hadron decays. If you look for supersymmetric particles at ATLAS and CMS, then the muons you are interested in are probably somewhere in the range of 30-100 GeV, where they are more likely to come from Z decays, or even higher energies, where particle decays are not a large contribution and the Drell-Yan process is important.

More context would really help.

 

[Eric Culbertson]

Thanks for the replies! The resources provided certainly will be helpful. The only thing my prof cares about is muons, the other products don't matter. We want a process that is common enough so that we don't have to generate too many events to get decent statistics.

All I know is that this is somehow relevant to the proposed fast timing layer for phase2 at CMS. Sorry for the lack of detailed info.

 

[mfb]

Why don't you directly produce the muons if that is all you care about?
J/Psi and Z should be fine. The calibration with data will probably use these particle as well.

 

[dukwon]

We want a process that is common enough so that we don't have to generate too many events to get decent statistics.

I know nothing about the CMS software, but surely you can force the decay modes...