THE MASTER SPACE OF N=1 GAUGE THEORIES

Transcription

1 THE MASTER SPACE OF N=1 GAUGE THEORIES Alberto Zaffaroni CAQCD 2008 Butti, Forcella, Zaffaroni hepth/ Forcella, Hanany, Zaffaroni hepth/ Butti,Forcella,Hanany,Vegh, Zaffaroni, arxiv Forcella,Hanany,He,Zaffaroni, arxiv Forcella,Hanany,He,Zaffaroni, arxiv

2 FIELD THEORY MOTIVATIONS: Study of the moduli space (vacua and spectrum) Counting problems in supersymmetric gauge theories D-BRANE MOTIVATIONS: N=1 supersymmetric theories appear on the worldvolume of D-branes - computation in gravitational duals Statistical properties of the BPS states and relation to black holes entropies INTRINSIC MOTIVATIONS: Interplay with math: (Combinatorics, Rep. Theory and Quivers)

3 Moduli space of N=1 Theories: In supersymmetric gauge theories with chiral matter superfields X, gauge group G and a superpotential W(X) M = F // Gc F term solutions D term solutions modulo gauge transformations == Complexified Gauge Group W( X) X = 0 G G c parametrized by field VEVS parametrized by gauge invariant BPS chiral operators flat directions holomorphic functions on moduli space

4 EXAMPLE: Classical SQCD α ( N, N ) Q, c f i = 1,..., N f α = N 1,..., c i Q α i G = SU( N c ) W = 0 no F-terms Gauge invariant chiral operators (mesons and baryons): Q Q α i α j α α α i i i i i i i i i i B Q Q B Q Q α 1 N = ε Nc ε c Nf N N N N N α ε i i = ε ε N c N 1 N 1... f α ε c f c c f c Nc For 3 N /2< N < 3N IR fixed point c f c For N N + 1 no quantum corrections to the moduli space f c 2NN c f M = // G properties studied: [Pouliot].[Romelsberger] [Hanany-He-Mekarreya-Vejjala]

5 N=1 QUIVER GAUGE THEORIES N=1 gauge theories live on D branes probing conical Calabi-Yau singularities: 1,3 X C( H) Physical branes: 4d conformal gauge theories D3 branes Fractional branes: non conformal theories (confinement, cascades, susy breaking) All theory of Quiver Type: gauge groups G = U( Ni ) bifundamental or adjoints fields X g i superpotential W(X)

6 Orbifolds of N=4 SYM: 3 3 / Z 3 U V W =Φ[ Φ, Φ ] W = ε W UVW ijk i j k Toric Calabi-Yaus generalizations of abelian orbifolds: 1,1 C(T ) 152 CL ( ) W = εε AB A B ij pq i p j q W =...

7 Correspondence CALABI-YAU and N=1 QUIVER gauge theories: classification for toric CY (dimers/tiling) [Franco,Kennaway,Hanany,Vegh,Wecht] H = S, T, Y, L 5 1,1 pq, pqr,, few metrics known ( ) but many interesting questions solved without knowledge of the metric. [Gauntlett,Martelli,Sparks,Waldram] [Cvetic,Lu,Page,Pope] As a prediction from AdS/CFT (near horizon AdS5 H ) an infinite class of 4d SUPERCONFORMAL THEORIES: Ni N Many tests:[klebanov-witten] [Benvenuti,Franco,Hanany,Martelli,Sparks] [Butti,Zaffaroni]

8 COMMON LORE: QFT theory moduli space == brane moduli space For N=4 SYM: Φ N N matrices i [ Φi, Φ j] = 0 Φi diagonal 3 For a generic CY X: Mesonic moduli space M N Sym( X ) X Baryonic directions FI terms; blowing up modes

9 Baryonic directions: In the IR theory: all abelian gauge factors decouple U( N) SU( N) U(1) appears as global baryonic symmetries X di-baryons: det X Baryonic flat directions: det X 0

10 It turns out that: the N=1 moduli space (MASTER SPACE) Contains the mesonic moduli space X; dim =3 X It is itself a Calabi-Yau manifold of dim = g+2 Generically reducible (example: N=2 SYM) the N>1 moduli space Determined by the master space dim = 3 N + g -1

11 In theories with symmetries, information encoded in a single function, known as Hilbert Series H () t = n( k) t k generating functions for holomorphic functions/ chiral operators t = chemical potential for global symmetries n(k) = number of hol. functions of charge k = number of BPS operators of charge k Density of states with charge Structure of moduli space: dimensions, generators, relations P() t Ht () = c d t 1 d (1 t) (1 t) Math=degree Phys= # d.o.f dimension

12 N=1 MASTER SPACE = solution of F-terms N=4 SYM W Trivial F-terms: N=1 moduli space [ Φ, Φ ] = 0 i Φi j uv q i 3 / Non trivial F terms: 3 = ε uv w ijk i j k u v i j j i uw u w i j j i wv = = = w v i j j i (no gauge groups in the IR) 3 1 Hq () = (1 q)(1 q)(1 q) Ht () t+ t = 5 (1 t) 2

13 Algebraic variety dw=0 Symplectic quotient Palindromic property w Ht () = th(1/ t) is itself a toric CALABI-YAU

14 N>1: Computing gauge invariants The problem of finding (classical) gauge invariants goes back to the ninenteenth century (invariant theory). N M matrices X R[X ] = [X ]/{ W(X ) = 0} ij ij ij ij R INV = R[X ] // G ij General methods due to Hilbert: free resolutions, syzygies Now algorithmical (Groebner basis) Explicit formulae when W=0 (Molien) With computers and computer algebra programs really computable (but for small values of N and M) Still very hard to get general formulae for generic N,M

15 For quiver theories: is the key to N>1 Warming up: N=4 SYM N=1 N>1 3 = 3 N = Sym(( ) ) Φ Φ Φ t t t n n n n n n H(t)= 1 (1-t )(1 t )(1 t ) N PE[ νh( t)] = ν gn ( t) k k Exp( H ( t ) υ / k) k = 1 pletystic exponential counts symmetric products

16 General Conjecture: given the expansion of the N=1 generating function in sectors with definite baryonic charge B 1 i = 1, B i B= g ({ t}; CY) b g ({ t}; CY) the partition function at finite N is given by N B ν N i = ν 1, B i N= 0 B= g ({ t}; CY) b PE[ g ({ t}; CY)] based on geometrical quantization of wrapped D3 branes in AdS dual.

17 Full partition function for the conifold N=1 A ( A1, A2, B1, B2) ( t1, t1, t2, t2) baryonic charge (1,1,-1,-1) B Trivial F-terms: N=1 moduli space A i B p A=A j j B p Ai 4 1 g ( t) = = ( g ( t) ( n+ 1)( n+ 1 + B) t t ) n n+ B , B 1 2 (1 t1) (1 t2) B Finite N: N g () tν = PE[ νg ()] t N B 1, B Checked against explicit computation for N=2,3.

18 Some specific examples: conifold N=2 generators:

19 Some specific examples: conifold N=3 (F degree 24 polinomial) generators:

20 SEIBERG INVARIANCE The master space partition function is the same for Seiberg dual theories Extension of Seiberg duality to N=1 HIDDEN SYMMETRIES DUAL INTERPRETATION BPS states can be obtained by quantizing wrapped D3 branes in the AdS dual: counts classical configuration of supersymmetric D3 g () t 1

21 Comments and Conclusions Counting problems in N=1 gauge theories are continuous source of interesting results: General understanding of the structure of BPS partition functions for selected class of theories Non trivial statistical properties Discretized Kahler moduli and similarity with Nekrasov/ Topological string partition functions Other interesting questions: superconformal index ¼ BPS partition function (black holes) non conformal models

22 APPENDIX

23 Pletystic Exponential counts symmetrized products of elements P in a set S with generating function ( ) n g1 q = q Introduce a new parameter: υ n S 1 N g( q, υ) = = υ gn ( q) (1 ) n S n υ q N = 1 n k kn k k υ = υ = 1 υ n S k= 1 n S k= 1 Exp( log(1 q )) Exp( q / k) Exp( g ( q ) / k)

24 Connection to dimers: Okounkov,Nekrasov,Vafa Franco,Kennaway,Hanany,Vegh,Wecht 152 L

25 Dimers, combinatorics and charges: Hanany-Witten construction for local CY 21 Y delpezzo 1 = Y 21

26 Connection to a-maximization: Central charge of the CFT determined by combinatorial data: 9 Tr 3 V,V,V i j k i, j, k a= R = < > aa a 32 i j k d i = 1 a i = 2 Butti,Zaffaroni Benvenuti,Pando-Zayas,Tachikawa Lee,Rey Thanks to a-maximization (Intriligator,Wecht) the exact R-charge of the CFT is obtained by maximizing a

27 In general toric CY B is replaced by a sum over the Kahler cone g (; tcy) = g () t 1 1, β β GKZ Y21 example

28 DIGRESSION: geometrical interpretation g1, B ( q) counts integer points in convex polytopes Relation with kahler modulus: