Open Access. Powered by Scholars. Published by Universities.®
Elementary Particles and Fields and String Theory Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Discipline
- Keyword
-
- D-branes (11)
- Supersymmetric Gauge Theory (11)
- Brane Dynamics in Gauge Theories (8)
- Perturbative QCD (5)
- Field Theories in Lower Dimensions (4)
-
- D-Branes (3)
- Duality in Gauge Field Theories (3)
- Entanglement (3)
- Gauge-gravity correspondence (3)
- Quantum chromodynamics (3)
- Conformal Field Theory (2)
- Differential and Algebraic Geometry (2)
- Entropy (2)
- Gluons (2)
- QCD Phenomenology (2)
- Scattering Amplitudes (2)
- Supersymmetric gauge theory (2)
- Supersymmetry Breaking (2)
- Supersymmetry and Duality (2)
- Top quark (2)
- Anisotropic fluctuations (1)
- Anomalies in Field and String Theories (1)
- Automation (1)
- Axion QED (1)
- Azimuthal cumulant (1)
- BBGKY hierarchy (1)
- BPS black hole microstates (1)
- Baryons (1)
- Black holes (1)
- Bosons (1)
Articles 31 - 52 of 52
Full-Text Articles in Elementary Particles and Fields and String Theory
Global Constraints On Top Quark Anomalous Couplings, Frédéric Déliot, Ricardo Faria, Miguel C. N. Fiolhais, Pedro Lagarelhos, António Onofre, Christopher M. Pease, Ana Vasconcelos
Global Constraints On Top Quark Anomalous Couplings, Frédéric Déliot, Ricardo Faria, Miguel C. N. Fiolhais, Pedro Lagarelhos, António Onofre, Christopher M. Pease, Ana Vasconcelos
Publications and Research
The latest results on top quark physics, namely single top quark production cross sections, W-boson helicity and asymmetry measurements are used to probe the Lorentz structure of the Wtb vertex. The increase of sensitivity to new anomalous physics contributions to the top quark sector of the standard model is quantified by combining the relevant results from Tevatron and the Large Hadron Collider. The results show that combining an increasing set of available precision measurements in the search for new physics phenomena beyond the standard model leads to significant sensitivity improvements, especially when compared with the current expectation for the …
Bipartite Field Theories And D-Brane Instantons, Sebastían Franco, Eduardo García-Valdecasas, Angel M. Uranga
Bipartite Field Theories And D-Brane Instantons, Sebastían Franco, Eduardo García-Valdecasas, Angel M. Uranga
Publications and Research
We study D-brane instantons in systems of D3-branes at toric CY 3-fold singularities. The instanton effect can be described as a backreaction modifying the geometry of the mirror configuration, in which the breaking of U(1) symmetries by the instanton translates into the recombination of gauge D-branes, which also directly generates the instanton-induced charged field theory operator. In this paper we describe the D-brane instanton backreaction in terms of a combinatorial operation in the bipartite dimer diagram of the original theory. Interestingly, the resulting theory is a general Bipartite Field Theory (BFT), defined by a bipartite graph tiling a general (possibly …
The Weizsäcker-Williams Distribution Of Linearly Polarized Gluons (And Its Fluctuations) At Small X, Adrian Dumitru, Vladimir Skokov
The Weizsäcker-Williams Distribution Of Linearly Polarized Gluons (And Its Fluctuations) At Small X, Adrian Dumitru, Vladimir Skokov
Publications and Research
The conventional and linearly polarized Weizsäcker-Williams gluon distributions at small x are defined from the two-point function of the gluon field in light-cone gauge. They appear in the cross section for dijet production in deep inelastic scattering at high energy. We determine these functions in the small-x limit from solutions of the JIMWLK evolution equations and show that they exhibit approximate geometric scaling. Also, we discuss the functional distributions of these WW gluon distributions over the JIMWLK ensemble at rapidity Y ∼ 1/αs. These are determined by a 2d Liouville action for the logarithm of the …
Prompt Photon-Jet Angular Correlations At Central Rapidities In P + A Collisions, Sanjin Benić, Adrian Dumitru
Prompt Photon-Jet Angular Correlations At Central Rapidities In P + A Collisions, Sanjin Benić, Adrian Dumitru
Publications and Research
Photon-jet azimuthal correlations in proton-nucleus collisions are a promising tool for gaining information on the gluon distribution of the nucleus in the regime of nonlinear color fields. We compute such correlations from the process $g → q\bar{q}γ$ in the rapidity regime where both the projectile and target light-cone momentum fractions are small. By integrating over the phase space of the quark which emits the photon, subject to the restriction that the photon picks up most of the transverse momentum (to pass an isolation cut), we effectively obtain a g + A → qγ process. For nearly back-to-back photon-jet configurations we …
Baryon Magnetic Moments: Symmetries And Relations, Assumpta Parreño, Martin J. Savage, Brian C. Tiburzi, Jonas Wilhelm, Emmanuel Chang, William Detmold, Kostas Orginos
Baryon Magnetic Moments: Symmetries And Relations, Assumpta Parreño, Martin J. Savage, Brian C. Tiburzi, Jonas Wilhelm, Emmanuel Chang, William Detmold, Kostas Orginos
Publications and Research
Magnetic moments of the octet baryons are computed using lattice QCD in background magnetic fields, including the first treatment of the magnetically coupled Σ0- Λ system. Although the computations are performed for relatively large values of the up and down quark masses, we gain new insight into the symmetries and relations between magnetic moments by working at a three-flavor mass-symmetric point. While the spinflavor symmetry in the large Nc limit of QCD is shared by the naïve constituent quark model, we find instances where quark model predictions are considerably favored over those emerging in the large N …
Octet Baryons In Large Magnetic Fields, Amol Deshmukh, Brian C. Tiburzi
Octet Baryons In Large Magnetic Fields, Amol Deshmukh, Brian C. Tiburzi
Publications and Research
Magnetic properties of octet baryons are investigated within the framework of chiral perturbation theory. Utilizing a power counting for large magnetic fields, the Landau levels of charged mesons are treated exactly giving rise to baryon energies that depend nonanalytically on the strength of the magnetic field. In the small-field limit, baryon magnetic moments and polarizabilities emerge from the calculated energies. We argue that the magnetic polarizabilities of hyperons provide a testing ground for potentially large contributions from decuplet pole diagrams. In external magnetic fields, such contributions manifest themselves through decuplet-octet mixing, for which possible results are compared in a few …
3d Printing Of 2d N = (0, 2) Gauge Theories, Sebastían Franco, Azeem Hasan
3d Printing Of 2d N = (0, 2) Gauge Theories, Sebastían Franco, Azeem Hasan
Publications and Research
We introduce 3d printing, a new algorithm for generating 2d N = (0, 2) gauge theories on D1-branes probing singular toric Calabi-Yau 4-folds using 4d N = 1 gauge theories on D3-branes probing toric Calabi-Yau 3-folds as starting points. Equivalently, this method produces brane brick models starting from brane tilings. 3d printing represents a significant improvement with respect to previously available tools, allowing a straightforward determination of gauge theories for geometries that until now could only be tackled using partial resolution. We investigate the interplay between triality, an IR equivalence between different 2d N = …
Elliptic Genera Of 2d (0,2) Gauge Theories From Brane Brick Models, Sebastian Franco, Dongwook Ghim, Sangmin Lee, Rak-Kyeong Seong
Elliptic Genera Of 2d (0,2) Gauge Theories From Brane Brick Models, Sebastian Franco, Dongwook Ghim, Sangmin Lee, Rak-Kyeong Seong
Publications and Research
We compute the elliptic genus of abelian 2d (0, 2) gauge theories corresponding to brane brick models. These theories are worldvolume theories on a single D1-brane probing a toric Calabi-Yau 4-fold singularity. We identify a match with the elliptic genus of the non-linear sigma model on the same Calabi-Yau background, which is computed using a new localization formula. The matching implies that the quantum effects do not drastically alter the correspondence between the geometry and the 2d (0, 2) gauge theory. In theories whose matter sector suffers from abelian gauge anomaly, we propose an ansatz for an anomaly …
Supergroups In Critical Dimensions And Division Algebras, Čestmir Burdik, Sultan Catto, Yasemin Gürcan, Amish Khalfan, Levent Kurt, V. Kato La
Supergroups In Critical Dimensions And Division Algebras, Čestmir Burdik, Sultan Catto, Yasemin Gürcan, Amish Khalfan, Levent Kurt, V. Kato La
Publications and Research
We establish a link between classical heterotic strings and the groups of the magic square associated with Jordan algebras, allowing for a uniform treatment of the bosonic and superstring sectors of the heterotic string.
Bulk Viscous Corrections To Screening And Damping In Qcd At High Temperatures, Qianqian Du, Adrian Dumitru, Yun Guo, Michael Strickland
Bulk Viscous Corrections To Screening And Damping In Qcd At High Temperatures, Qianqian Du, Adrian Dumitru, Yun Guo, Michael Strickland
Publications and Research
Non-equilibrium corrections to the distribution functions of quarks and gluons in a hot and dense QCD medium modify the “hard thermal loops” (HTL). The HTLs determine the retarded, advanced, and symmetric (time-ordered) propagators for gluons with soft momenta as well as the Debye screening and Landau damping mass scales. We compute such corrections to a thermal as well as to a non-thermal fixed point. The screening and damping mass scales are sensitive to the bulk pressure and hence to (pseudo-) critical dynamical scaling of the bulk viscosity in the vicinity of a second-order critical point. This could be reflected in …
Uv Completions For Non-Critical Strings, Fabio Apruzzi, Falk Hassler, Jonathan J. Heckman, Ilarion V. Melnikov
Uv Completions For Non-Critical Strings, Fabio Apruzzi, Falk Hassler, Jonathan J. Heckman, Ilarion V. Melnikov
Publications and Research
Compactifications of the physical superstring to two dimensions provide a general template for realizing 2D conformal field theories coupled to worldsheet gravity, i.e. non-critical string theories. Motivated by this observation, in this paper we determine the quasi-topological 8D theory which governs the vacua of 2D N = (0, 2) gauged linear sigma models (GLSMs) obtained from compactifications of type I and heterotic strings on a Calabi-Yau fourfold. We also determine the quasi-topological 6D theory governing the 2D vacua of intersecting 7-branes in compactifications of F-theory on an elliptically fibered Calabi-Yau fivefold, where matter fields and interaction terms localize on lower-dimensional …
Unifying Ancient And Modern Geometries Through Octonions, Sultan Catto, Yasemin Gürcan, Amish Khalfan, Levent Kurt
Unifying Ancient And Modern Geometries Through Octonions, Sultan Catto, Yasemin Gürcan, Amish Khalfan, Levent Kurt
Publications and Research
We show the first unified description of some of the oldest known geometries such as the Pappus’ theorem with more modern ones like Desargues’ theorem, Monge’s theorem and Ceva’s theorem, through octonions, the highest normed division algebra in eight dimensions. We also show important applications in hadronic physics, giving a full description of the algebra of color applicable to quark physics, and comment on further applications.
Clifford Algebras And Their Decomposition Into Conjugate Fermionic Heisenberg Algebras, Sultan Catto, Yasemin Gürcan, Amish Khalfan, Levent Kurt, V. Kato La
Clifford Algebras And Their Decomposition Into Conjugate Fermionic Heisenberg Algebras, Sultan Catto, Yasemin Gürcan, Amish Khalfan, Levent Kurt, V. Kato La
Publications and Research
We discuss a construction scheme for Clifford numbers of arbitrary dimension. The scheme is based upon performing direct products of the Pauli spin and identity matrices. Conjugate fermionic algebras can then be formed by considering linear combinations of the Clifford numbers and the Hermitian conjugates of such combinations. Fermionic algebras are important in investigating systems that follow Fermi-Dirac statistics. We will further comment on the applications of Clifford algebras to Fueter analyticity, twistors, color algebras, M-theory and Leech lattice as well as unification of ancient and modern geometries through them.
Boundary Conditions As Dynamical Fields, V. Parameswaran Nair, Dimitra Karabali
Boundary Conditions As Dynamical Fields, V. Parameswaran Nair, Dimitra Karabali
Publications and Research
The possibility of treating boundary conditions in terms of a bilocal dynamical field is formalized in terms of a boundary action. This allows for a simple path-integral perturbation theory approach to physical effects such as radiation from a time-dependent boundary. The nature of the action which governs the dynamics of the bilocal field is investigated for a limited case (which includes the Robin boundary conditions).
D-Brane Instantons As Gauge Instantons In Orientifolds Of Chiral Quiver Theories, Sebastian Franco, Ander Retolaza, Angel Uranga
D-Brane Instantons As Gauge Instantons In Orientifolds Of Chiral Quiver Theories, Sebastian Franco, Ander Retolaza, Angel Uranga
Publications and Research
Systems of D3-branes at orientifold singularities can receive non-perturbative D-brane instanton corrections, inducing field theory operators in the 4d effective theory. In certain non-chiral examples, these systems have been realized as the infrared end point of a Seiberg duality cascade, in which the D-brane instanton effects arise from strong gauge theory dynamics. We present the rst UV duality cascade completion of chiral D3-brane theories, in which the D-brane instantons arise from gauge theory dynamics. Chiral examples are interesting because the instanton fermion zero mode sector is topologically protected, and therefore lead to more robust setups. As an application of our …
Do All Bps Black Hole Microstates Carry Zero Angular Momentum?, Abishek Chowdhury, Richard S. Garavuso, Swapnamay Mondal, Ashoke Sen
Do All Bps Black Hole Microstates Carry Zero Angular Momentum?, Abishek Chowdhury, Richard S. Garavuso, Swapnamay Mondal, Ashoke Sen
Publications and Research
From the analysis of the near horizon geometry and supersymmetry algebra it has been argued that all the microstates of single centered BPS black holes with four unbroken supersymmetries carry zero angular momentum in the region of the moduli space where the black hole description is valid. A stronger form of the conjecture would be that the result holds for any sufficiently generic point in the moduli space. In this paper we set out to test this conjecture for a class of black hole microstates in type II string theory on T6 , represented by four stacks of D-branes wrapped …
2d (0,2) Quiver Gauge Theories And D-Branes, Sebastian Franco, Dongwook Ghim, Sangmin Lee, Rak-Kyeong Seong, Daisuke Yokoyama
2d (0,2) Quiver Gauge Theories And D-Branes, Sebastian Franco, Dongwook Ghim, Sangmin Lee, Rak-Kyeong Seong, Daisuke Yokoyama
Publications and Research
We initiate a systematic study of 2d(0,2) quiver gauge theories on the world-volume of D1-branes probing singular toric Calabi-Yau 4-folds. We present an algorithm for efficiently calculating the classical mesonic moduli spaces of these theories, which cor-respond to the probed geometries. We also introduce a systematic procedure for constructing the gauge theories for arbitrary toric singularities by means of partial resolution, which translates to higgsing in the field theory. Finally, we introduce Brane Brick Models, a novel class of brane configurations that consist of D4-branes suspended from an NS5-brane wrap-ping a holomorphic surface, tessellating a 3-torus. Brane Brick Models are …
Singly-Spinning Black Rings Ind= 5 U(1)3 Supergravity, H. Lu, C. N. Pope, Justin F. Vázquez-Poritz, Zhibai Zhang
Singly-Spinning Black Rings Ind= 5 U(1)3 Supergravity, H. Lu, C. N. Pope, Justin F. Vázquez-Poritz, Zhibai Zhang
Publications and Research
We construct black ring solutions in five-dimensional U(1)3supergravity which carry three dipole charges, three electric charges and one angular momentum parameter.These solutions are written in a form that is sufficiently compact that their global and thermodynamic properties can be studied explicitly. In particular, we find that the Smarrformula is obeyed regardless of whether or not conical singularities are present, where as the first law of thermodynamics holds only in the absence of conical singularities. We also present black ring solutions with three background magnetic fields.
Non-Planar On-Shell Diagrams, Sebastían Franco, Daniele Galloni, Brenda Penante, Congkao Wen
Non-Planar On-Shell Diagrams, Sebastían Franco, Daniele Galloni, Brenda Penante, Congkao Wen
Publications and Research
We initiate a systematic study of non-planar on-shell diagrams in N = 4 SYM and develop powerful technology for doing so. We introduce canonical variables generalizing face variables, which make the d log form of the on-shell form explicit. We make significant progress towards a general classification of arbitrary on-shell diagrams by means of two classes of combinatorial objects: generalized matching and matroid polytopes. We propose a boundary measurement that connects general on-shell diagrams to the Grassmannian. Our proposal exhibits two important and non-trivial properties: positivity in the planar case and it matches the combinatorial description of the diagrams in …
Azimuthal Asymmetries And The Emergence Of “Collectivity” From Multi-Particle Correlations In High-Energy Pa Collisions, Adrian Dumitru, Larry Mclerran, Vladimir Skokov
Azimuthal Asymmetries And The Emergence Of “Collectivity” From Multi-Particle Correlations In High-Energy Pa Collisions, Adrian Dumitru, Larry Mclerran, Vladimir Skokov
Publications and Research
We show how angular asymmetries ∼ cos 2φ can arise in dipole scattering at high energies. We illustrate the effects due to anisotropic fluctuations of the saturation momentum of the target with a finite correlation length in the transverse impact parameter plane, i.e. from a domain-like structure. We compute the two-particle azimuthal cumulant in this model including both one-particle factorizable as well as genuine two-particle non-factorizable contributions to the two-particle cross section. We also compute the full BBGKY hierarchy for the four-particle azimuthal cumulant and find that only the fully factorizable contribution to c2{4} is negative while …
Automated Computation Of Scattering Amplitudes From Integrand Reduction To Monte Carlo Tools, Hans Van Deurzen, Gionata Luisoni, Pierpaolo Mastrolia, Giovanni Ossola, Zhibai Zhang
Automated Computation Of Scattering Amplitudes From Integrand Reduction To Monte Carlo Tools, Hans Van Deurzen, Gionata Luisoni, Pierpaolo Mastrolia, Giovanni Ossola, Zhibai Zhang
Publications and Research
After a general introduction about the calculation of one-loop scattering amplitudes via integrand-level techniques, which led to the construction of efficient and automated computational tools for NLO predictions, we briefly describe an approach to the reduction of scattering amplitudes based on integrand-level reduction via multivariate polynomial division also applicable beyond one-loop amplitudes. We also review the main features of the GoSam 2.0 automated framework for NLO calculations and show some of its application to Standard Model processes involving the production massive particles, such as the Higgs boson or top-quark pairs, obtained embedding of the virtual amplitudes produced by GoSam within …
Algebraic Formulation Of Hadronic Supersymmetry Based On Octonions: New Mass Formulas And Further Applications, Sultan Catto, Yasemin Gürcan, Amish Khalfan, Levent Kurt
Algebraic Formulation Of Hadronic Supersymmetry Based On Octonions: New Mass Formulas And Further Applications, Sultan Catto, Yasemin Gürcan, Amish Khalfan, Levent Kurt
Publications and Research
A special treatment based on the highest division algebra, that of octonions and their split algebraic formulation is developed for the description of diquark states made up of two quark pairs. We describe symmetry properties of mesons and baryons through such formulation and derive mass formulae relating π, ρ, N and Δ trajectories showing an incredible agreement with experiments. We also comment on formation of diquark-antidiquark as well as pentaquark states and point the way toward applications into multiquark formulations expected to be seen at upcoming CERN experiments. A discussion on relationship of our work to flux bag models, string …