u***@gmail.com

2005-07-01 09:28:33 UTC

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Hi,Raw Message

What is the easiest and/or best argument on that the string zero slope

limit alpha' ->0 is the point particle limit?

Thanks,

Kang-Sin

Discussion:

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u***@gmail.com

2005-07-01 09:28:33 UTC

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Hi,Raw Message

What is the easiest and/or best argument on that the string zero slope

limit alpha' ->0 is the point particle limit?

Thanks,

Kang-Sin

Robert C. Helling

2005-07-04 15:47:56 UTC

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On Fri, 1 Jul 2005 05:28:33 -0400, ***@gmail.com <***@gmail.com> wrote:Raw Message

> Hi,

>

> What is the easiest and/or best argument on that the string zero slope

> limit alpha' ->0 is the point particle limit?

alpha' is inversely proportional to the string tension. Sending it to

zero makes the string shrink to a point. Furthermore, all vibrations

of the string become infinitely costly in energy. In the quantum

theory, the masses of all the string modes are proportional to

1/alpha' so all but the massless modes decouple from the theory and

you are left only with the massless point-particles (hopefully, you've

already gotten rid of the tachyon).

Robert

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Robert C. Helling School of Science and Engineering

International University Bremen

print "Just another Phone: +49 421-200 3574

stupid .sig\n"; http://www.aei-potsdam.mpg.de/~helling

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