Sanning over masses in particle production and decay

Asked by Aviad

CalcHep team hello,

I have a problem concerning a production of a new particle and its decay while scanning its mass.

To be specific, I need to create an extra-SM particle, and then decay it.

I want to make a scan on the particle mass, say from 100 to 1000 GeV, in steps of 100. In each mass value I want to produce the particle and decay it, according to its decay channels.

Now this is the problem. The particle decays in both 1->2 and 1->3 channels, so I can't use automatic calculation.

I think that I need to use slha for this particle.

However, since I want to scan over a range of masses, I don't know if I can do that.

I need for the slha file to be called in each mass step, and that the file will update its decay channels branching ratios according to the present mass in each call.

Is this possible to achieve?

Thanks very much in advance,


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Solved by:
Neil Christensen
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Neil Christensen (neil-christensen-qft) said :

Is the total width dominated by the 1->2 decays?

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Aviad (aviadroi) said :

The 1->2 decays are about 20% of the total decays

(the other 80% are the 1->3 decays)


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Best Neil Christensen (neil-christensen-qft) said :

Can the total width be fit with a simple function of the mass? If so, put the width in the "Constraints" table.

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Aviad (aviadroi) said :

Thanks Neil Christensen, that solved my question.

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Aviad (aviadroi) said :

Thank you very much.

This seems to be working.