Periods, Coupling Constants and Modular Functions in N=2 SU(2) SYM with Massive Matter
نویسنده
چکیده
We determine the mass dependence of the coupling constant for N=2 SYM with Nf = 1, 2, 3 and 4 flavours. All these cases can be unified in one analytic expression, given by a Schwarzian triangle function. Moreover we work out the connection to modular functions which enables us to give explicit formulas for the periods. Using the form of the J–functions we are able to determine in an elegant way the couplings and monodromies at the superconformal points. ∗ Supported by the Swiss National Science Foundation and the EEC under contracts SC1–CT92–0789 and European Comission TMR programme ERBFMRX–CT96–0045. Email: [email protected] and [email protected]
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