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Problem with Xi(1820) in EvtGen [message #18558]

Wed, 14 October 2015 13:49

Jennifer Pütz
Messages: 47
Registered: April 2015
Location: FZ Juelich

continuous participant

From: *ikp.kfa-juelich.de

Hi everyone,

I have a problem with EvtGen.

I want to simulate pbar p → Xi(1820)- Xi+. For this I added Xi(1820) to the evt.pdl file with

add  p Particle  Xi(1820)-   23314  1.8230000e+00  2.4000000e-02  2.0000000e-01    -3     3  0.0000000e+00      23314

Xi(1820)- has a mass of 1.823 GeV/c^2 and spin 3/2.
But if I run EvtGen the mass distribution of Xi(1820)- has a rectangular shape.

index.php?t=getfile&id=8545&private=0

If I change the spin to 1/2 or 5/2 the mass distribution is looking fine (see plots below).

index.php?t=getfile&id=8548&private=0

For other particles with spin 3/2 EvtGen is running fine.

I wrote already to the person who is responsible for the mass generation in EvtGen. But he is not answering.
Maybe there is someone of you having an idea how to fix this.

Cheers,

Jenny

---------
I am using:

PandaROOT: trunk rev. 28555
FairSoft: mar15
FairRoot: v-15.03a

Attachment: XiMinus1820_Spin_3half.png
(Size: 32.24KB, Downloaded 401 times)
Attachment: XiMinus1820_Spin_1half.png
(Size: 21.95KB, Downloaded 377 times)
Attachment: XiMinus1820_Spin_5half.png
(Size: 22.21KB, Downloaded 381 times)
Attachment: evt.pdl
(Size: 75.49KB, Downloaded 225 times)
Attachment: XiMinus_1820_lambda0_K.dec
(Size: 0.27KB, Downloaded 230 times)

[Updated on: Wed, 14 October 2015 13:50]

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[Message index]

		Problem with Xi(1820) in EvtGen By: Jennifer Pütz on Wed, 14 October 2015 13:49
		Re: Problem with Xi(1820) in EvtGen By: StefanoSpataro on Wed, 14 October 2015 15:30
		Re: Problem with Xi(1820) in EvtGen By: Jennifer Pütz on Wed, 14 October 2015 15:35
		Re: Problem with Xi(1820) in EvtGen By: StefanoSpataro on Wed, 14 October 2015 17:25
		Re: Problem with Xi(1820) in EvtGen By: Jennifer Pütz on Thu, 15 October 2015 09:26
		Re: Problem with Xi(1820) in EvtGen By: StefanoSpataro on Thu, 15 October 2015 14:10
		Re: Problem with Xi(1820) in EvtGen By: Jennifer Pütz on Thu, 15 October 2015 14:18
		Re: Problem with Xi(1820) in EvtGen By: StefanoSpataro on Sun, 01 November 2015 13:50
		Re: Problem with Xi(1820) in EvtGen By: Elisabetta Prencipe (2) on Sun, 01 November 2015 17:03
		Re: Problem with Xi(1820) in EvtGen By: StefanoSpataro on Sun, 01 November 2015 17:11
		Re: Problem with Xi(1820) in EvtGen By: Jennifer Pütz on Mon, 02 November 2015 09:52
		Re: Problem with Xi(1820) in EvtGen By: StefanoSpataro on Mon, 02 November 2015 10:49
		Re: Problem with Xi(1820) in EvtGen By: Jennifer Pütz on Mon, 02 November 2015 10:50

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