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SUMMARY: Polylogarithms in tree-level open string calculations - Johannes 
 Broedel  (ETH Zurich)
DTSTART:20130214T130000Z
DTEND:20130214T140000Z
UID:TALK43556@talks.cam.ac.uk
CONTACT:Dr Dorigoni
DESCRIPTION:Recent investigations have revealed a beautiful structure in o
 pen string tree-level amplitudes: they can be organized in terms of classe
 s of multiple zeta values\, which in turn provide the link to a related Ho
 pf-algebra structure.\nWhile the open string tree-level function can be wr
 itten in an extraordinarily simple form\, the actual calculation was subje
 ct to difficulties and thus confined to low multiplicities and low orders 
 in the inverse string tension. In this talk I will describe how to employ 
 polylogarithms in order to algebraically obtain results for any multiplici
 ty efficiently. Those results can be used to test the underlying algebra f
 or previously unaccessible scenarios.
LOCATION:Potter Room (first floor\, Pav. B)
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