Re: d+ meson leptonic decay

Hi Ercan

Did you un-discard the neutrino-transport? See the Manual under DISCARD:

 3) Neutrinos are always discarded by default, to avoid useless
    tracking. To force neutrinos (or other particles) to be NOT
    discarded, make their particle number or name to be preceded by a
    minus sign. In that case, however, remember that:
    - no neutrino cross sections are available for transport in FLUKA:
      these particles are just tracked through the geometry until they
      escape. Boundary crossing and tracklength density can however be
      scored if requested
    - if neutrinos are not discarded, their transport threshold is set
      = 0. by default. This value can be changed (by option PART-THR),
      but it must be kept in mind that the energy of any neutrino
      produced below the threshold WILL BE DEPOSITED LOCALLY, generating
      a likely bias in dose calculations.

cheers
Stefan

On Mon, 1 Dec 2008, ercan pilicer wrote:

> dear all
>
> i try to obtain and check if there is a leptonic decay for d+ meson by;
>
> d+ --> e- + e_neutrino
> d+ --> muon- + muon_neutrino
> d+ --> tau- + tau_neutrino
>
> but i can not see produced tau+.
>
> am i making a physical mistake in my input card?
>
> ciao
> e.
>
>
>
> --=20
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
> ()".'."() Ercan Pilicer
> ( (T) ) Uludag University, Turkey
> (=C3=B6) (=C3=B6) High Energy Physics Department
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
>
>
>
> TITLE
> TAC Detector
> GLOBAL 1000.0 0.0 0.0 0.0 1.
> PHOTONUC 1111. ALUMINUM @LASTMAT
> DEFAULTS PRECI=
> SIO
> BEAM -2.25 0.0 10000.0 D+
> BEAMPOS 0.0 0.0 0.0 0.0 0.0
> PHYSICS 1. PROTON @LASTPAR DECAY=
> S
> GEOBEGIN COMBN=
> AME
> 0 0 TAC Charm factory geometry
> RPP exbox -5000.00 5000.00 -5000.00 5000.00 -5000.00 5000.00
> RPP inbox -50. 50. -50. 50. -50. 50.
> RCC bp1 0.00 0.00 -50. 0.00 0.00 20. 1.
> RCC bp2 0.00 0.00 -50. 0.00 0.00 20. 2.00
> RCC bp3 0.00 0.00 30.00 0.00 0.00 20. 1.
> RCC bp4 0.00 0.00 30.00 0.00 0.00 20. 2.00
> END
> bpl 5 +bp2 -bp1
> bpr 5 +bp4 -bp3
> invoid 5 +inbox -( +bp2 -bp1 ) -( +bp4 -bp3 )
> exvoid 5 +exbox -inbox
> END
> GEOEND
> ASSIGNMA BLCKHOLE exvoid
> ASSIGNMA VACUUM invoid
> ASSIGNMA BERYLLIU bpl
> ASSIGNMA BERYLLIU bpr
> SCORE BEAMPART
> USRBIN 11. BEAMPART -25. 1. 0.0 1.BPart
> USRBIN 0.0 0.0 -1. 100. 100. 100.&
> USRBIN 11. TAU+ -25. 1. 0.0 1.tau+
> USRBIN 0.0 0.0 -1. 100. 100. 100.&
> USRBIN 11. ELECTRON -25. 1. 0.0 1.elect=
> rn
> USRBIN 0.0 0.0 -1. 100. 100. 100.&
> USRBIN 11. MUON+ -25. 1. 0.0 1.muon
> USRBIN 0.0 0.0 -1. 100. 100. 100.&
> RANDOMIZ 1.0
> START 1D5 9999999.0
> STOP
>
> --=3D-F6VTZKr3ixBvd0XMTw5C--
>
>

-- 
___________________________________
Stefan Roesler
CERN, SC/RP
CH-1211 Geneva 23
Switzerland
Phone:  +41-22-7679891
Fax:    +41-22-7669639
E-mail: Stefan.Roesler_at_cern.ch