Browsing by Author "ALFARO, J"
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- ItemBRST SYMMETRY OF FIELD REDEFINITIONS(1992) ALFARO, J; DAMGAARD, PH
- ItemEXTENDED DEFINITION OF THE REGULATED JACOBIAN IN THE PATH INTEGRAL CALCULATION OF ANOMALIES(1988) ALFARO, J; URRUTIA, LF; VERGARA, JD
- ItemFIELD TRANSFORMATIONS, COLLECTIVE COORDINATES AND BRST INVARIANCE(1990) ALFARO, J; DAMGAARD, PH
- ItemGENERALIZED LAGRANGIAN MASTER-EQUATIONS(1994) ALFARO, J; DAMGAARD, PHWe discuss the geometry of the Lagrangian quantization scheme based on (generalized) Schwinger-Dyson BRST symmetries. When a certain set of ghost fields are integrated out of the path integral, we recover the Batalin-Vilkovisky formalism, now extended to arbitrary functional measures for the classical fields. Keeping the ghosts reveals the crucial role played by a natural connection on the space of fields.
- ItemHIDDEN SUPERSYMMETRY AND LARGE-N(1988) ALFARO, J
- ItemLARGE-N LIMIT OF THE 2-HERMITIAN-MATRIX MODEL BY THE HIDDEN BRST METHOD(1993) ALFARO, JThis paper discusses the large-N limit of the two-Hermitian-matrix model in zero dimensions, using the hidden Becchi-Rouet-Stora-Tyutin method. A system of integral equations previously found is solved, showing that it contained the exact solution of the model in leading order of large N.
- ItemON THE BRST INVARIANCE OF FIELD DEFORMATIONS(1989) ALFARO, J; DAMGAARD, PH; LATORRE, JI; MONTANO, D
- ItemPLATELET AUTOANTIBODIES IN PATIENTS WITH CHRONIC LIVER-DISEASE(1995) PEREIRA, J; ACCATINO, L; ALFARO, J; BRAHM, J; HIDALGO, P; MEZZANO, DThe thrombocytopenia in chronic liver disease (CLD) has been attributed mainly to hypersplenism, although other factors such as reduced mean life span with increased platelet turnover have also been demonstrated, Immunological abnormalities have been described in the pathogenesis and progression of CLD. In this sense, many studies have reported elevated levels of platelet associated IgG (PAIgG) in patients with CLD, and it has been suggested that PAIgG could represent true antiplatelet antibody. In this study we used a glycoprotein (GP)-specific immunoassay (MACE) to determine whether PAIgG or circulating antiplatelet antibodies, reacted against the GPIIb/IIIa or GPIb/IX complexes, in patients with CLD. Thirty-six patients with CLD of diverse etiology were studied (20 female, mean age 53 years, range 38-75 years). 23 out of 36 patients (64%) had anti-GP antibodies in MACE, Particularly, 12 had anti-GPIb, 4 anti-GPIIb/IIIa, and 7 had both types of autoantibodies, The existence of these anti-GP antibodies was not related with the blood platelet count or etiology of CLD,
- ItemSCHWINGER-DYSON EQUATIONS AS SUPERSYMMETRIC WARD IDENTITIES(1989) ALFARO, J; DAMGAARD, PH
- ItemSTABLE FIELD CONFIGURATIONS IN THE LARGE-N LIMIT - STOCHASTIC APPROACH(1988) ALFARO, J; HUERTA, L
- ItemSTOCHASTIC QUANTIZATION AND THE LARGE-N LIMIT OF QUANTUM-FIELD THEORIES(1993) ALFARO, JWe review the application of stochastic quantization to the large N limit of quantum field theories. Important properties of this limit such as the Eguchi-Kawai reduction and the master field idea are discussed in detail, illustrated by several examples. We rely on the Langevin and Fokker-Planck approaches to stochastic processes. Specially interesting is the use of the hidden supersymmetry of the path integral formulation of random processes to find the master field equations.
- ItemSUPERSYMMETRY AND LARGE-N LIMIT IN A ZERO-DIMENSIONAL 2-MATRIX MODEL(1989) ALFARO, J; RETAMAL, JC
- ItemTHE ITZYKSON-ZUBER INTEGRAL FOR U(M/N)(1995) ALFARO, J; MEDINA, R; URRUTIA, LF
- ItemTHE ORTHOGONALITY RELATIONS FOR THE SUPERGROUP U(M-VERTICAL-BAR-N)(1995) ALFARO, J; MEDINA, R; URRUTIA, LFStarting from the generalization of the Itzykson-Zuber integral for U(m/n) we study the orthogonality relations for this supergroup.