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Re: eta_c generation with EvtGen [message #12845 is a reply to message #12839]

Sat, 03 December 2011 23:35

Dima Melnychuk
Messages: 213
Registered: April 2004
Location: National Centre for Nucle...

first-grade participant

From: *play-internet.pl

Hi Stefano,

Actually I think that preferable solution here is to put spin of pbarpSystem to 1.

In general in proton-antiproton anihilation limiting to S and P waves 6 states with different quantum numbers are possible. Particularly Psi(3770) as J^(PC)=1^(--) state correspond to ^3S_1 of p-pbar system.

And in principle if we know that Psi(3770) is produced means that anihilation took place with these quantum numbers.

So spin of pbarpSystem should be adjusted to the the spin of particle we want to produced.
Of course it's a little bit inconvenient to edit evt.pdl every time for this purpose but I do not know another solution at the moment.

Dima

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[Message index]

		eta_c generation with EvtGen By: Dima Melnychuk on Thu, 01 December 2011 12:44
		Re: eta_c generation with EvtGen By: StefanoSpataro on Thu, 01 December 2011 15:48
		Re: eta_c generation with EvtGen By: Dima Melnychuk on Fri, 02 December 2011 14:35
		Re: eta_c generation with EvtGen By: StefanoSpataro on Fri, 02 December 2011 20:52
		Re: eta_c generation with EvtGen By: Dima Melnychuk on Sat, 03 December 2011 23:35
		Re: eta_c generation with EvtGen By: StefanoSpataro on Sun, 04 December 2011 01:24
		Re: eta_c generation with EvtGen By: StefanoSpataro on Tue, 06 December 2011 23:24

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