[Brahms-dev-l] Re: pp spectra at eta=0

Dear Zhangbao,

Happy new year also to you.

On the trigger let me just repeat what is in
http://www.sdcc.bnl.gov/brahms/private/list_hyper/brahms-dev-l/2919.html

The trigger is highly effecient, It does not loose track (as long it goes by
the slats).
It has a fair amount of background - so you cannot blame the result on the
trigger.

I recall that Claus have similar differences shown at the coll. meeting,
unfortunately the pres. are
not on our website, so I could not check. Certainly more work has also been
done since by Claus.  I cannot
tell from the higher pt due to the binning if it is also lower in that
range - maybe you could bin into say 400 or 500 MeV bins at the higher pt.
It should also be recalled that the ref. pp was not a measured spectrum, but
evaluated from UA1.

regards
    Flemming


----------------------------------------------------------------
Flemming Videbaek
Physics Department
Brookhaven National Laboratory

e-mail: videbaek@bnl.gov
phone: 631-344-4106

> Hi.
>
> Happy new year to you! (A little bit late, but not for Chinese and Korean
> or maybe Japanese.)
>
> Attached is h^- spectra at midrapidity I got so far. The backline is our
> published reference spectrum. Another plots is the ratio between what I
> got and the pulished.
>
> Now the yields is too low. And I found that there are more than half MRS
> triggers didn't give MRS track. Does it mean either tracking efficiency is
> bad or there are huge background? Please comment. If it is due to
> inefficiency of tracking then I got very much higher yield as I told you
> before, but if it is due to backgound the result is what I show you in
> this e-mail.
>
> Best regards,
> Zhongbao
> -----------------------------------------------------
> Zhongbao YIN                 Phone:  +47-55-582792 (O)
> Address:                             +47-55-276803 (H)
>   Fantoftveien 14G 466       E-mail:
>   5075  Bergen                  Yin.Zhongbao@fi.uib.no
> ------------------------------------------------------
>


_______________________________________________
Brahms-dev-l mailing list
Brahms-dev-l@lists.bnl.gov
http://lists.bnl.gov/mailman/listinfo/brahms-dev-l