Ok. JH pointed out to me that the option is IHPR2 not IHNT2. I run hijing with non-single diffractive option. Now, it produces dn/deta =2.5 at eta =0. This is right number. Using this HIJING pp in our BRAG (GEANT), INEL counter efficiency is now 85%. So, as a summary, this is my result. INEL efficency 72% in total inelastic cross section 85% in non-single diffractive cross section Hiro Hironori Ito wrote: > Hello. I guess I made a mistake in efficiency in non-single > diffractive events since 10% increase in dn/deta is not the same as > 10% in cross section. As JH suggested, I tried to run Hijing with > non-single diffractive option using IHNT2(13) =3 option. But, I did > not see any change in dn/deta. Therefore, I am not quite sure how to > run Hijing with this option. > > Hiro > > Hironori Ito wrote: > >> Hello. Since so many people asked about INEL efficency, I just dig >> up my files. (I thought these things are checked by someone who are >> writing Ph.d thesis. :) ) Here is the conclusion I made. >> 1. From the Hijing 1.383, our INEL counter is about 72% efficient. >> (see http://www4.rcf.bnl.gov/~hito/run03/hijing_pp_inel_efficiency.gif ) >> >> 2. Now, looking into what HIJING 1.383 really is for pp. I looked >> at dn/deta from raw hijing output. At, eta=0, it is 2.2 . From UA5 >> ppbar results (see http://pdg.lbl.gov/2002/contents_plots.html you >> can find a postscrip file there.), it shows 2.2 with the words saying >> "The number per pseudorapidity interval is about 10% higher if the >> rate is normalized excluding singly diffractive events rather than to >> the total inelastic rate." This tells me that Hijing pp produces the >> total inelastic collisions. (This also means the following. Since >> we don't trigger on single diffractive events, what we can measure >> is 90% efficient at most. Our INEL is 72/90=80 % efficient for >> non-single diffractive events.) >> >> >> If people need it, I can also dig my old files for dAu. >> >> >> Hiro >> >> _______________________________________________ >> Brahms-l mailing list >> Brahms-l@lists.bnl.gov >> http://lists.bnl.gov/mailman/listinfo/brahms-l > > > > > _______________________________________________ > Brahms-l mailing list > Brahms-l@lists.bnl.gov > http://lists.bnl.gov/mailman/listinfo/brahms-l _______________________________________________ Brahms-l mailing list Brahms-l@lists.bnl.gov http://lists.bnl.gov/mailman/listinfo/brahms-lReceived on Tue Feb 10 23:24:47 2004
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