CalcHEP

mass is changing in .lhe file

Asked by Basabendu

Dear CalcHEP team,

                                   I am using calchep 3.6.25 to study beyond standard model physics for which I have implemented a model of my own in calcHEP. Now, while generating events using calchep_batch mode, I am getting a .lhe file in which everything is fine except the mass of one of the product particles is changing in every set of events (in the batch file the mass of that particle has been put by hand and hence should remain fixed!). It would be really nice if you could point out some possible source of error.

                                 Thank you so much for your time.

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Alexander Pukhov (pukhov) said : 		#1

Send details, please. Event file indeed contains virtual masses for resonances which can be different from pole passes.
It is a part of LHA accord. In other places masses should be correct.

Best
    Alexander Pukhov

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Basabendu (bb1988-1) said : 		#2

Dear Professor Alexander Pukhov,

                                                              Thank you so much for your reply. Point is, the masses of the particles which are supposed to be fixed are changing continuously in the lhe file. If possible, may I send the lhe file and/or the batch file itself?

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Alexander Pukhov (pukhov) said : 		#3

Surely. send me your files. And explain me how you conclude that mass is changing.
Is it a mass of incoming particle, outgoing or virtual?

My email address is
     <email address hidden>
Best
    Alexander Pukhov

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Basabendu (bb1988-1) said : 		#4

Dear Professor Alexander Pukhov,

                                                               Thank you for the mail.