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Corrections to Macroscopic Supersymmetric BlackHole Entropy
, 1998
"... We determine the corrections to the entropy of extremal black holes arising from terms quadratic in the Riemann tensor in N = 2; D = 4 supergravity theories. We follow Wald's proposal to modify the BekensteinHawking area law. The new entropy formula, whose value only depends on the electric/ma ..."
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Cited by 169 (15 self)
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of microstates performed some time ago by Maldacena, Strominger, Witten and by Vafa. December 1998 a cardoso@phys.uu.nl b bdewit@phys.uu.nl c mohaupt@hera1.physik.unihalle.de Some time ago the microscopic entropy was determined for certain black holes arising in CalabiYau compactifications of M
Deviations from the Area Law for Supersymmetric Black Holes
, 1999
"... We review modifications of the BekensteinHawking area law for black hole entropy in the presence of higherderivative interactions. In fourdimensional N = 2 compactifications of string theory or Mtheory these modifications are crucial for finding agreement between the macroscopic entropy obtained ..."
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Cited by 79 (3 self)
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to incorporate nonholomorphic corrections. March 1999 a cardoso@phys.uu.nl b bdewit@phys.uu.nl c mohaupt@hera1.physik.unihalle.de 1 Introduction It is one of the most intriguing properties of black holes in general relativity that one can derive a set of laws, called the laws of black hole mechanics
HigherOrder BlackHole Solutions in N = 2 Supergravity and CalabiYau String Backgrounds
, 1998
"... Based on special geometry, we consider corrections to N = 2 extremal blackhole solutions and their entropies originating from higherorder derivative terms in N = 2 supergravity. These corrections are described by a holomorphic function, and the higherorder blackhole solutions can be expressed in ..."
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Cited by 28 (0 self)
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d luest@qft1.physik.huberlin.de e mohaupt@hera1.physik.unihalle.de f sabra@qft2.physik.huberlin.de One of the celebrated successes within the recent nonperturbative understanding of string theory and Mtheory is the matching of the thermodynamic BekensteinHawking blackhole entropy
Dual Heterotic BlackHoles in Four and Two Dimensions
, 1998
"... We consider a class of extremal and nonextremal fourdimensional blackhole solutions occuring in toroidally compactified heterotic string theory, whose tendimensional interpretation involves a KaluzaKlein monopole and a fivebrane. We show that these fourdimensional solutions can be connected to ..."
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Cited by 1 (0 self)
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transformations in four dimensions. These transformations are implemented by performing a reduction on a twotorus with Lorentzian signature. We argue that the same mechanism can be applied to extremal and nonextremal blackhole solutions in the FHSV model. June 1998 a cardoso@phys.uu.nl b mohaupt@hera1
Black Holes and Flop Transitions in MTheory on CalabiYau Threefolds
, 1998
"... We present fivedimensional extreme black hole solutions of Mtheory compactified on CalabiYau threefolds and study these solutions in the context of flop transitions in the extended Kahler cone. In particular we consider a specific model and present black hole solutions, breaking half of N = 2 supe ..."
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Cited by 8 (2 self)
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.65; Keywords: String Theory, Phase Transitions, Black Holes, N = 2 Supergravity. 1 Email: I.W.Gaida@damtp.cam.ac.uk, swapna@beta.iopb.stpbh.soft.net, mohaupt@hera1.physik.unihalle.de, W.Sabra@qmw.ac.uk. # Research supported by Deutsche Forschungsgemeinschaft (DFG), Regular Associate of the ICTP
DOUBLE SCALING VIOLATIONS
, 1996
"... We discuss the theoretical implications of the scaling properties of F p at small x observed in recent HERA experiments. We show that 2 low Q2 data display double scaling violations which are adequately described by NL ln Q2 corrections. Scaling violations due to summations of leading and subleading ..."
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Cited by 4 (1 self)
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We discuss the theoretical implications of the scaling properties of F p at small x observed in recent HERA experiments. We show that 2 low Q2 data display double scaling violations which are adequately described by NL ln Q2 corrections. Scaling violations due to summations of leading
HigherOrder Gravitational Couplings And Modular Forms In N=2, D=4 Heterotic String Compactifications
, 1996
"... The restrictions of targetspace duality are imposed at the perturbative level on the holomorphic Wilsonian couplings that encode certain higherorder gravitational interactions in N = 2; D = 4 heterotic string compactifications. A crucial role is played by nonholomorphic corrections. The requirem ..."
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Cited by 6 (0 self)
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Kahlerclass modulus grows large. We explicitly evaluate some of the higherorder couplings for a toroidal compactification with two moduli T and U , and we express them in terms of modular forms. July 1996 CERNTH/96182 1 email: bdewit@fys.ruu.nl, cardoso@surya11.cern.ch, luest@qft1.physik
Model (In)dependent Features of the Hard Pomeron
, 1996
"... We discuss the smallx behaviour of the nexttoleading BFKL equation, depending on various smoothing out procedures of the running coupling constant at low momenta. While scaling violations (with resummed and calculable anomalous dimensions) turn out to be always consistent with the renormalization ..."
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Cited by 1 (0 self)
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of the experimental finding [2] of rising structure functions at HERA and has triggered a number of papers about the nexttoleading (NL) BFKL equation [3] and the corresponding anomalous dimensions [4, 5]. One of the interesting features of the NL BFKL equation is supposed to be the description of running coupling
DFF 298/1/98 Energy Scale and Coherence Effects in Smallx Equations
, 1998
"... I consider the nexttoleading highenergy cluster expansion of largek double jet production in QCD, and I determine the corresponding oneloop quark and gluon impact factors for a selfconsistent energy scale. The result shows that coherent angular ordering of emitted gluons holds for hard emissio ..."
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emission also, and singles out a scale which in essentially the largest virtuality in the process. Both remarks are relevant for the precise determination of the BFKL kernel at the nexttoleading level. PACS 12.38.Cy 1 Various attempts to understand the smallx HERA data on structure functions and final
Measurement of elastic $\phi$ photoproduction at HERA
"... General rights It is not permitted to download or to forward/distribute the text or part of it without the consent of the author(s) and/or copyright holder(s), other than for strictly personal, individual use, unless the work is under an open content license (like Creative Commons). Disclaimer/Comp ..."
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GeV2 has been studied with the ZEUS detector at HERA. The differential 4 photoproduction cross section du/dt has an exponential shape and has been determined in the kinematic range 0.1 < it/ < 0.5 GeV' and 60 < W < 80 GeV. An integrated cross section of flYI' _Q,, = 0.96 f O.l9
Results 1  10
of
12