Expected range of possible dilaton expectation values? [Archive]

Yaakov K

Aug23-04, 01:31 PM

<jabberwocky><div class="vbmenu_control"><a href="jabberwocky:;" onClick="newWindow=window.open('','usenetCode','toolbar=no, location=no,scrollbars=yes,resizable=yes,status=no ,width=650,height=400'); newWindow.document.write('<HTML><HEAD><TITLE>Usenet ASCII</TITLE></HEAD><BODY topmargin=0 leftmargin=0 BGCOLOR=#F1F1F1><table border=0 width=625><td bgcolor=midnightblue><font color=#F1F1F1>This Usenet message\'s original ASCII form: </font></td></tr><tr><td width=449><br><br><font face=courier><UL><PRE>Hi,\n\nAny thoughts on what range the dilaton expectation value will\neventually be found to lie in?\n\nThanks\nYaakov\n\n</UL></PRE></font></td></tr></table></BODY><HTML>');"> <IMG SRC=/images/buttons/ip.gif BORDER=0 ALIGN=CENTER ALT="View this Usenet post in original ASCII form">  View this Usenet post in original ASCII form </a></div><P></jabberwocky>Hi,

Any thoughts on what range the dilaton expectation value will
eventually be found to lie in?

Thanks
Yaakov

Urs Schreiber

Aug23-04, 02:09 PM

<jabberwocky><div class="vbmenu_control"><a href="jabberwocky:;" onClick="newWindow=window.open('','usenetCode','toolbar=no, location=no,scrollbars=yes,resizable=yes,status=no ,width=650,height=400'); newWindow.document.write('<HTML><HEAD><TITLE>Usenet ASCII</TITLE></HEAD><BODY topmargin=0 leftmargin=0 BGCOLOR=#F1F1F1><table border=0 width=625><td bgcolor=midnightblue><font color=#F1F1F1>This Usenet message\'s original ASCII form: </font></td></tr><tr><td width=449><br><br><font face=courier><UL><PRE>\n"Yaakov K" <yaakov.krotin@sympatico.ca> schrieb im Newsbeitrag\nnews:3276eb2d.0408231024.4cb995f2-100000@posting.google.com...\n\n> Any thoughts on what range the dilaton expectation value will\n> eventually be found to lie in?\n\nThe current landscape discussion is mostly done for weak coupling, as far as\nI am aware. But the only reason for that is that away from weak coupling you\ncannot calculate with present technology.\n\n\n</UL></PRE></font></td></tr></table></BODY><HTML>');"> <IMG SRC=/images/buttons/ip.gif BORDER=0 ALIGN=CENTER ALT="View this Usenet post in original ASCII form">  View this Usenet post in original ASCII form </a></div><P></jabberwocky>"Yaakov K" <yaakov.krotin@sympatico.ca> schrieb im Newsbeitrag
news:3276eb2d.0408231024.4cb995f2-100000@posting.google.com...

> Any thoughts on what range the dilaton expectation value will
> eventually be found to lie in?

The current landscape discussion is mostly done for weak coupling, as far as
I am aware. But the only reason for that is that away from weak coupling you
cannot calculate with present technology.

Yaakov K

Aug23-04, 11:48 PM

<jabberwocky><div class="vbmenu_control"><a href="jabberwocky:;" onClick="newWindow=window.open('','usenetCode','toolbar=no, location=no,scrollbars=yes,resizable=yes,status=no ,width=650,height=400'); newWindow.document.write('<HTML><HEAD><TITLE>Usenet ASCII</TITLE></HEAD><BODY topmargin=0 leftmargin=0 BGCOLOR=#F1F1F1><table border=0 width=625><td bgcolor=midnightblue><font color=#F1F1F1>This Usenet message\'s original ASCII form: </font></td></tr><tr><td width=449><br><br><font face=courier><UL><PRE>Could the planck and string scales be equal?\n\n[Moderator\'s note: Yes, they can be equal, under special circumstances,\nnamely if the string coupling equals one and/or the volume of the compact\ndimensions is the string scale. It used to be assumed in the 1980s that\nthe string scale and the Planck scale are virtually identical. However,\ntoday we usually think about the string scale to be a lower (energy);\nthe string scale is a positive power of the string coupling constant\ntimes the Planck scale. It is also more usual today to consider the\nvolumes of the compact dimensions to be very different from one. LM]\n\n</UL></PRE></font></td></tr></table></BODY><HTML>');"> <IMG SRC=/images/buttons/ip.gif BORDER=0 ALIGN=CENTER ALT="View this Usenet post in original ASCII form">  View this Usenet post in original ASCII form </a></div><P></jabberwocky>Could the planck and string scales be equal?

[Moderator's note: Yes, they can be equal, under special circumstances,
namely if the string coupling equals one and/or the volume of the compact
dimensions is the string scale. It used to be assumed in the 1980s that
the string scale and the Planck scale are virtually identical. However,
today we usually think about the string scale to be a lower (energy);
the string scale is a positive power of the string coupling constant
times the Planck scale. It is also more usual today to consider the
volumes of the compact dimensions to be very different from one. LM]