Graviton Mass

<blockquote id="quote"><font size="2" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by Gregg</i>
<br />What is the the estimated mass (~order of magnitude) of a graviton at its normal velocity of ~20 billion times the velocity of light waves?<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">In Slabinski's chapter in <i>Pushing Gravity</i>, we find derivations of a number of constraints on graviton model parameters. Let N = number of gravitons per unit volume of space (when far from any material, deflecting bodies) per unit solid angle for their directions of travel. And let m_g be the mass of a graviton. Then eqn. (25) says that N m_g &lt; 2.3 x 10^-63 g/cc. -|Tom|-

Tom,

Wouldn't that number effectively be a flux density number? He asked about the individual graviton. Do you have a number for N?

"Imagination is more important than Knowledge" -- Albert Einstien

<blockquote id="quote"><font size="2" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by Mac</i>
<br />Wouldn't that number effectively be a flux density number? He asked about the individual graviton. Do you have a number for N?<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">No experiment measures N and m_g separately. The constraint I listed is the best we can do for now. But intuition indicates that N is probably &gt;&gt; 1, so m_g &lt;&lt; 10^-63 g. -|Tom|-