Dobry den,
dovolim si predeslat, ze tento post obsahuje jednu kratkou
Ynformaci a jednu delsi informaci skutecnou (ktera navic
bude v anglictine), pokud se timto netrefi do zamereni
boardu, prosim o presun, vhodnejsi board jsem zde bohuzel
nenasel.
V sobotu MF DNES uverejnila clanek (onu zminenou "ynformaci",
podle nejz jakysi profesor chysta provest laboratorni (nikoli
pocitacovou) simulaci Velkeho tresku, v jehoz dusledku by
s malou lec nenulovou pravdepodobnosti mohlo dojit ke vzniku
miniaturni cerne diry schopne zlikvidovat celou planetu.
Clanek jsem forwardnul Lumovi, ten ho tlumocil zminovanemu
profesorovi a zde je jeho odpoved:
---------- Forwarded message ----------
Date: Tue, 27 Jul 1999 21:26:33 -0400
From: Bill Zajc <zajc@columbia.edu>
To: Lubos Motl <motl@physics.rutgers.edu>
Subject: RE: Little big bang
Dear Lubos:
The experiment is PHENIX, the collider is RHIC, if you go to my home
page below you will find links to both.
On the PHENIX news list I recently posted a message
http://www.phenix.bnl.gov/phenix/WWW/lists/phenix-news-l/recent/msg00352.html
pointing my collaborators to some old calculations that show that RHIC
will not produce any collisions that haven't occurred "millions"
of time in the past (from cosmic ray collisions). So the skepticism
you hinted at in your message shows good intuition.
This is a good example of what happens when one tries to advertise the
facility-- we do expect it to reproduce (very roughly speaking) conditions
present about 10 microseconds *after* the Big Bang, but
a. That's not the same as the Big Bang itself, or even a little version
thereof
b. To a physicist used to thinking logarithmically, there are many
length/energy
scales between t=0 and t=10^{-5} seconds.
I hope this is useful,
Bill Zajc
+-----------------------------------------------------------------------+
| Prof. W.A. Zajc zajc@columbia.edu |
| http://www.nevis.columbia.edu/~zajc |
+-----------------------------------------------------------------------+
|
