Massive Scaling Limit of beta-Deformed Matrix Model of Selberg Type

Details Massive Scaling Limit of beta-Deformed Matrix Model of Selberg Type Massive Scaling Limit of beta-Deformed Matrix Model of Selberg Type

2010-08-11

arxiv.org/abs/1008.1861v2

Phys.Rev.D82:085031,2010

Physics

High Energy Physics

High Energy Physics - Theory

LaTeX, 21 pages; v2: a reference added

Scientific paper

10.1103/PhysRevD.82.085031

We consider a series of massive scaling limits m_1 -> infty, q -> 0, lim m_1 q = Lambda_{3} followed by m_4 -> infty, Lambda_{3} -> 0, lim m_4 Lambda_{3} = (Lambda_2)^2 of the beta-deformed matrix model of Selberg type (N_c=2, N_f=4) which reduce the number of flavours to N_f=3 and subsequently to N_f=2. This keeps the other parameters of the model finite, which include n=N_L and N=n+N_R, namely, the size of the matrix and the "filling fraction". Exploiting the method developed before, we generate instanton expansion with finite g_s, epsilon_{1,2} to check the Nekrasov coefficients (N_f =3,2 cases) to the lowest order. The limiting expressions provide integral representation of irregular conformal blocks which contains a 2d operator lim frac{1}{C(q)} : e^{(1/2) \alpha_1 \phi(0)}: (int_0^q dz : e^{b_E phi(z)}:)^n : e^{(1/2) alpha_2 phi(q)}: and is subsequently analytically continued.

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