BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CERN//INDICO//EN BEGIN:VEVENT SUMMARY:On the smallness of the cosmological constant in SUGRA models with Planck scale SUSY breaking and degenerate vacua DTSTART;VALUE=DATE-TIME:20140705T093000Z DTEND;VALUE=DATE-TIME:20140705T100000Z DTSTAMP;VALUE=DATE-TIME:20260419T050833Z UID:indico-contribution-122-1568@indico.ific.uv.es DESCRIPTION:Speakers: Roman Nevzorov (University of Adelaide)\nIn $N=1$ su pergravity (SUGRA) supersymmetric (SUSY) and non-supersymmetric Minkowski vacua originating in the hidden \nsector can be degenerate. This allows f or consistent \nimplementation of the multiple point principle (MPP) \nass umption. We present no--scale inspired SUGRA model \nwhere the MPP assumpt ion is realised at the tree--level \nwithout extra fine-tuning. In the sup ersymmetric phase \nin flat Minkowski space SUSY may be broken dynamically \ninducing tiny vacuum energy density which can be assigned\, \nby virtue of MPP\, to all other phases including the one \nin which we live. We arg ue that the measured value of the cosmological constant\, as well as the s mall values of \nquartic Higgs self--coupling and the corresponding beta \ nfunction at the Planck scale\, which can be obtained by extrapolating the Standard Model (SM) couplings to high \nenergies\, can originate from sup ergravity (SUGRA) models \nwith degenerate vacua. This scenario is realise d if \nthere are at least three exactly degenerate vacua. In the \nfirst v acuum\, associated with the physical one\, local \nsupersymmetry (SUSY) is broken near the Planck scale \nwhile the breakdown of the $SU(2)_W\\times U(1)_Y$ symmetry \ntakes place at the electroweak (EW) scale. In the seco nd \nvacuum local SUSY breaking is induced by gaugino condensation \nat a scale which is just slightly lower than $\\Lambda_{QCD}$ \nin the physical vacuum. Finally\, in the third vacuum local \nSUSY and EW symmetry are br oken near the Planck scale.\n\nhttps://indico.ific.uv.es/event/2025/contri butions/1568/ LOCATION: Sala 8+9 URL:https://indico.ific.uv.es/event/2025/contributions/1568/ END:VEVENT BEGIN:VEVENT SUMMARY:Calculating repetitively.III: DTSTART;VALUE=DATE-TIME:20140705T100000Z DTEND;VALUE=DATE-TIME:20140705T103000Z DTSTAMP;VALUE=DATE-TIME:20260419T050833Z UID:indico-contribution-122-1437@indico.ific.uv.es DESCRIPTION:Speakers: Gopinath Kamath (Indian Institute of Technology Madr as)\nThis talk has two highlights: a. The utility of the Dirac δ – func tion as an aid to repetitive integration in multiple integrals\, and b. An extension to 3 + 1 dimensional stationary curved space of a recent effort by the author in 2 + 1 dimensional stationary curved space to determine t he zeta function for the Lagrangian density for a real massive scalar fiel d using the Schwinger operator expansion\; this is a reworking to advantag e by the author of the Antonsen – Bormann idea that was originally propo sed by these latter authors for the computation of the heat kernel in curv ed space. The repetitive nature of the calculation in 2 + 1 dimensional cu rved space at all higher orders(≥3) in the gravitational constant G sugg ested the use of the Dirac delta-function and one of its integral represen tations – in that it is convenient to obtain answers\, so its utility is also checked in the 3 + 1 dimensional case.\n\nhttps://indico.ific.uv.es/ event/2025/contributions/1437/ LOCATION: Sala 8+9 URL:https://indico.ific.uv.es/event/2025/contributions/1437/ END:VEVENT BEGIN:VEVENT SUMMARY:A unified approach to nuclei: The BPS Skyrme Model DTSTART;VALUE=DATE-TIME:20140705T130000Z DTEND;VALUE=DATE-TIME:20140705T133000Z DTSTAMP;VALUE=DATE-TIME:20260419T050833Z UID:indico-contribution-122-1418@indico.ific.uv.es DESCRIPTION:Speakers: Carlos Naya (Universidade de Santiago de Compostela and Instituto Galego de Física de Altas Enerxías (IGFAE))\nIn this talk\ , we will present a concrete model of a low energy effective field theory of QCD\, the well-known Skyrme Model. Specifically\, we will work with the BPS submodel [1] in order to describe the binding energies of nuclei. Thi s BPS Skyrme model is charaterized by having a saturated bound for the ene rgy proportional to the baryon number of the nuclei. After presenting this classical result\, we will proceed with a semi-classical quantization of the coordinates of spin and isospin. Then\, with the further inclusion of the Coulomb interaction as well as a small explicit breaking of the isospi n symmetry\, we finally calculate the binding energies of nuclei\, where a n excellent agreement has been found for the nuclei with high baryon numbe r [2]\, [3].\n\n\nReferences\n\n[1] C. Adam\, J. Sanchez-Guillen\, A. Were szczynski\, Acta Phys. Pol. B 41\, (2010) 2717 .\n[2] C. Adam\, C. Naya\, J. Sanchez-Guillen\, A. Wereszczynski\, Phys. Rev. Lett. 111 (2013) 232501 .\n[3] C. Adam\, C. Naya\, J. Sanchez-Guillen\, A. Wereszczynski\, Phys. R ev. C 88 (2013) 054313.\n\nhttps://indico.ific.uv.es/event/2025/contributi ons/1418/ LOCATION: Sala 8+9 URL:https://indico.ific.uv.es/event/2025/contributions/1418/ END:VEVENT BEGIN:VEVENT SUMMARY:Lifshitz hyperscaling violating holography DTSTART;VALUE=DATE-TIME:20140705T133000Z DTEND;VALUE=DATE-TIME:20140705T140000Z DTSTAMP;VALUE=DATE-TIME:20260419T050833Z UID:indico-contribution-122-1371@indico.ific.uv.es DESCRIPTION:Speakers: Ioannis Papadimitriou (Instituto de Fisica Teorica U AM/CSIC)\nHolographic techniques have been instrumental in understanding c ertain aspects of strongly correlated systems\, both in high energy and co ndensed matter physics. One of the most interesting applications of hologr aphy in the condensed matter setting is the study of quantum critical poin ts exhibiting Lifshitz or hyperscaling violating Lifshitz symmetry. Althou gh various aspects of the holographic dictionary for Lifshitz quantum crit ical points have been studied in special cases\, the general structure for arbitrary critical exponent z has not been fully understood\, while very little is known for the hyperscaling violating case. \n\nWe develop a gene ral method for systematically constructing the holographic dictionary for both Lifshitz and hyperscaling violating Lifshitz critical points with arb itrary Lorentz violating and hyperscaling violating parameters\, for a lar ge class of bulk actions admitting such backgrounds. This allows us to det ermine quite generically various physical properties of the dual quantum c ritical points\, such as the spectrum of operators\, the Ward identities\, and the Lifshitz confromal anomaly.\n\nhttps://indico.ific.uv.es/event/20 25/contributions/1371/ LOCATION: Sala 8+9 URL:https://indico.ific.uv.es/event/2025/contributions/1371/ END:VEVENT BEGIN:VEVENT SUMMARY:Vacuum instability in holography DTSTART;VALUE=DATE-TIME:20140705T103000Z DTEND;VALUE=DATE-TIME:20140705T110000Z DTSTAMP;VALUE=DATE-TIME:20260419T050833Z UID:indico-contribution-122-1358@indico.ific.uv.es DESCRIPTION:Speakers: Koji Hashimoto (Osaka university / RIKEN)\nWe analyz e vacuum instability of strongly coupled gauge theories in a constant\nele ctric field using AdS/CFT correspondence. The model is the N = 2 1-flavo r\nsupersymmetric large Nc QCD in the strong ’t Hooft coupling limit. We calculate the\nEuler-Heisenberg effective Lagrangian L(E)\, which encode s the nonlinear response\nand the quantum decay rate of the vacuum in a ba ckground electric field E\, from\nthe complex D-brane action in AdS/CFT. We find that the decay rate given by\nImL(E) becomes nonzero above a crit ical electric field set by the confining force\nbetween quarks. A large E expansion of Im L(E) is found to coincide with that\nof the Schwinger e ffects in QED\, replacing its electron mass by the confining force.\n\nh ttps://indico.ific.uv.es/event/2025/contributions/1358/ LOCATION: Sala 8+9 URL:https://indico.ific.uv.es/event/2025/contributions/1358/ END:VEVENT BEGIN:VEVENT SUMMARY:N=2 SUGRA BPS Multi-center solutions\, quadratic prepotentials and Freudenthal transformations DTSTART;VALUE=DATE-TIME:20140705T110000Z DTEND;VALUE=DATE-TIME:20140705T113000Z DTSTAMP;VALUE=DATE-TIME:20260419T050833Z UID:indico-contribution-122-1253@indico.ific.uv.es DESCRIPTION:Speakers: torrente-lujan emilio (universidad de murcia)\nWe pr esent a detailed description of $N=2$ stationary \nBPS multicenter black hole solutions for quadratic prepotentials\nwith an arbitrary number of ce nters and scalar fields\nmaking a systematic use of the algebraic propert ies of the matrix of second derivatives of the prepotential\, $\\mathcal{ S}$\, which in this case is a scalar-independent matrix. In particular we obtain bounds on the physical parameters of the multicenter solution such as horizon areas and ADM mass. We discuss the possibility and convenience of setting up a basis of the symplectic vector space built from charge \ne igenvectors of the $\\ssigma$\, the set of vectors \n$(\\Ppm q_a)$ with $\ \Ppm$ $\\ssigma$-eigenspace projectors.\n\nThe anti-involution matrix $\\m athcal{S}$ can be understood \nas a Freudenthal duality $\\tilde{x}=\\ssi gma x$.\nWe show that this duality can be generalized to\n``Freudenthal tr ansformations'' \n$$x\\to \\lambda\\exp(\\theta \\ssigma) x= a x+b\\tilde{ x}$$\nunder which the horizon area\, ADM mass and intercenter \ndistances scale up leaving constant the scalars at the fixed points.\nIn the special case $\\lambda=1$\, ``$\\ssigma$-rotations''\, \nthe transformations leav e invariant the solution.\nThe standard Freudenthal duality can be written as\n $\\tilde x= \\exp\\left(\\frac{\\pi}{2} \\ssigma\\right) x .$\nWe ar gue that these generalized transformations leave\ninvariant not only the quadratic prepotential theories\n but also the general stringy extremal qu artic form $\\Delta_4$\,\n$\\Delta_4(x)= \\Delta_4(\\cos\\theta x+\\sin\\t heta\\tilde{x})$\nand therefore its entropy at lowest order.\n\nhttps://in dico.ific.uv.es/event/2025/contributions/1253/ LOCATION: Sala 8+9 URL:https://indico.ific.uv.es/event/2025/contributions/1253/ END:VEVENT BEGIN:VEVENT SUMMARY:Spontaneous Breaking of Scale Invariance in U(N) Chern-Simons Gaug e Theories in Three Dimensions DTSTART;VALUE=DATE-TIME:20140705T140000Z DTEND;VALUE=DATE-TIME:20140705T143000Z DTSTAMP;VALUE=DATE-TIME:20260419T050833Z UID:indico-contribution-122-1108@indico.ific.uv.es DESCRIPTION:Speakers: William Bardeen (Fermilab)\nI demonstrate the existe nce of a massive phase in a conformally invariant U(N) \nChern-Simons gaug e theory in D=3 with matter fields in the fundamental representation. The se \nmodels have attracted recent attention as being dual\, in the conform al phase\, to theories of \nhigher spin gravity on AdS_4. Using the ‘t Hooft large N expansion\, exact solutions are \nobtained for scalar curren t correlators in the massive phase where the conformal symmetry \nis spont aneously broken. A massless dilaton appears as a composite state\, and it s \nproperties are discussed. Solutions exist for matter fields that are either bosons or fermions.\n\nhttps://indico.ific.uv.es/event/2025/contrib utions/1108/ LOCATION: Sala 8+9 URL:https://indico.ific.uv.es/event/2025/contributions/1108/ END:VEVENT BEGIN:VEVENT SUMMARY:A scenario for critical scalar field collapse in AdS_3 DTSTART;VALUE=DATE-TIME:20140705T143000Z DTEND;VALUE=DATE-TIME:20140705T150000Z DTSTAMP;VALUE=DATE-TIME:20260419T050833Z UID:indico-contribution-122-1071@indico.ific.uv.es DESCRIPTION:Speakers: Alessandro Fabbri (Centro Fermi / Univ. Bologna / IF IC (CSIC))\nWe present a family of exact solutions\, depending on two para meters\nalpha and b (related to the scalar field strength)\, to the three- dimensional Einstein-scalar field equations with negative cosmological con stant.\nFor b = 0 these solutions reduce to the static BTZ family of vacuu m\nsolutions\, with mass M =-alpha. For nonvanishing b\, the solutions bec ome\ndynamical and develop a strong spacelike central singularity. \nThe a lpha 0 agrees qualitatively with that observed in numerical simulations o f subcritical collapse. \nWe analyze the linear perturbations of the thres hold solution\,\nalpha = 0\, in the Lambda = 0 approximation\, and find th at it has only one unstable growing mode\, which qualifies it as a candida te critical solution for scalar field collapse.\n\nhttps://indico.ific.uv. es/event/2025/contributions/1071/ LOCATION: Sala 8+9 URL:https://indico.ific.uv.es/event/2025/contributions/1071/ END:VEVENT END:VCALENDAR