☆ 4.3 Article

LEPTONIC ELECTROWEAK SPIN-TORSION INTERACTIONS

MODERN PHYSICS LETTERS A (2011)

Journal

MODERN PHYSICS LETTERS A

Volume 26, Issue 23, Pages 1697-1705

Publisher

WORLD SCIENTIFIC PUBL CO PTE LTD

DOI: 10.1142/S0217732311036097

Keywords

Gravity with torsion; electroweak interactions; leptons

Categories

Astronomy & Astrophysics Physics, Nuclear Physics, Particles & Fields Physics, Mathematical

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Abstract

In this paper we consider the most general field equations for a system of two fermions of which one single-handed, showing that the spin-torsion interactions among these spinors have a structure identical to that of the electroweak forces among leptons; possible extensions are discussed.

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Prokoshin, S. Protopopescu, J. Proudfoot, M. Przybycien, D. Pudzha, A. Puri, P. Puzo, J. Qian, Y. Qin, A. Quadt, M. Queitsch-Maitland, A. Qureshi, M. Racko, F. Ragusa, G. Rahal, J. A. Raine, S. Rajagopalan, A. Ramirez Morales, K. Ran, T. Rashid, S. Raspopov, D. M. Rauch, F. Rauscher, S. Rave, B. Ravina, I Ravinovich, J. H. Rawling, M. Raymond, A. L. Read, N. P. Readio, M. Reale, D. M. Rebuzzi, A. Redelbach, G. Redlinger, K. Reeves, L. Rehnisch, J. Reichert, D. Reikher, A. Reiss, A. Rej, C. Rembser, A. Renardi, M. Renda, M. Rescigno, S. Resconi, E. D. Resseguie, S. Rettie, B. Reynolds, E. Reynolds, O. L. Rezanova, P. Reznicek, E. Ricci, R. Richter, S. Richter, E. Richter-Was, O. Ricken, M. Ridel, P. Rieck, O. Rifki, M. Rijssenbeek, A. Rimoldi, M. Rimoldi, L. Rinaldi, G. Ripellino, I Riu, J. C. Rivera Vergara, F. Rizatdinova, E. Rizvi, C. Rizzi, R. T. Roberts, S. H. Robertson, M. Robin, D. Robinson, C. M. Robles Gajardo, M. Robles Manzano, A. Robson, A. Rocchi, E. Rocco, C. Roda, S. Rodriguez Bosca, A. Rodriguez Perez, D. Rodriguez Rodriguez, A. M. Rodriguez Vera, S. Roe, O. Rohne, R. Roehrig, R. A. Rojas, B. Roland, C. P. A. Roland, J. Roloff, A. Romaniouk, M. Romano, N. Rompotis, M. Ronzani, L. Roos, S. Rosati, G. Rosin, B. J. Rosser, E. Rossi, L. P. Rossi, L. Rossini, R. Rosten, M. Rotaru, J. Rothberg, B. Rottler, D. Rousseau, G. Rovelli, A. Roy, D. Roy, A. Rozanov, Y. Rozen, X. Ruan, F. Ruehr, A. Ruiz-Martinez, A. Rummler, Z. Rurikova, N. A. Rusakovich, H. L. Russell, L. Rustige, J. P. Rutherfoord, E. M. Ruttinger, M. Rybar, G. Rybkin, E. B. Rye, A. Ryzhov, J. A. Sabater Iglesias, P. Sabatini, G. Sabato, S. Sacerdoti, H. F-W Sadrozinski, R. Sadykov, F. Safai Tehrani, B. Safarzadeh Samani, M. Safdari, P. Saha, S. Saha, M. Sahinsoy, A. Sahu, M. Saimpert, M. Saito, T. Saito, H. Sakamoto, A. Sakharov, D. Salamani, G. Salamanna, J. E. Salazar Loyola, A. Salnikov, J. Salt, D. Salvatore, F. Salvatore, A. Salvucci, A. Salzburger, J. Samarati, D. Sammel, D. Sampsonidis, D. Sampsonidou, J. Sanchez, A. Sanchez Pineda, H. Sandaker, C. O. Sander, I. G. Sanderswood, M. Sandhoff, C. Sandoval, D. P. C. Sankey, M. Sannino, Y. Sano, A. Sansoni, C. Santoni, H. Santos, S. N. Santpur, A. Santra, A. Sapronov, J. G. Saraiva, O. Sasaki, K. Sato, F. Sauerburger, E. Sauvan, P. Savard, R. Sawada, C. Sawyer, L. Sawyer, C. Sbarra, A. Sbrizzi, T. Scanlon, J. Schaarschmidt, P. Schacht, B. M. Schachtner, D. Schaefer, L. Schaefer, J. Schaeffer, S. Schaepe, U. Schaefer, A. C. Schaffer, D. Schaile, R. D. Schamberger, N. Scharmberg, V. A. Schegelsky, D. Scheirich, F. Schenck, M. Schernau, C. Schiavi, L. K. Schildgen, Z. M. Schillaci, E. J. Schioppa, M. Schioppa, K. E. Schleicher, S. Schlenker, K. R. Schmidt-Sommerfeld, K. Schmieden, C. Schmitt, S. Schmitt, S. Schmitz, J. C. Schmoeckel, L. Schoeffel, A. Schoening, P. G. Scholer, E. Schopf, M. Schott, J. F. P. Schouwenberg, J. Schovancova, S. Schramm, F. Schroeder, A. Schulte, H-C Schultz-Coulon, M. Schumacher, B. A. Schumm, Ph Schune, A. Schwartzman, T. A. Schwarz, Ph Schwemling, R. Schwienhorst, A. Sciandra, G. Sciolla, M. Scodeggio, M. Scornajenghi, F. Scuri, F. Scutti, L. M. Scyboz, C. D. Sebastiani, P. Seema, S. C. Seidel, A. Seiden, B. D. Seidlitz, T. Seiss, J. M. Seixas, G. Sekhniaidze, S. J. Sekula, N. Semprini-Cesari, S. Sen, C. Serfon, L. Serin, L. Serkin, M. Sessa, H. Severini, S. Sevova, T. Sfiligoj, F. Sforza, A. Sfyrla, E. Shabalina, J. D. Shahinian, N. W. Shaikh, D. Shaked Renous, L. Y. Shan, J. T. Shank, M. Shapiro, A. Sharma, A. S. Sharma, P. B. Shatalov, ,

Summary: This study presents an investigation into the charge conjugation and parity (CP) properties of the interaction between the Higgs boson and tau-leptons. The analysis is based on measuring CP-sensitive angular observables defined by the visible decay products of t-leptons produced in Higgs boson decays. The results are consistent with the predictions for the Higgs boson in the Standard Model.

EUROPEAN PHYSICAL JOURNAL C (2023)

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Article Astronomy & Astrophysics

Implementation of the ATLAS-SUSY-2018-32 analysis (sleptons and electroweakinos with two leptons and missing transverse energy; 139 fb-1)

Jack Y. Araz, Benjamin Fuks

Summary: The validation of our work is based on three different R-parity conserving supersymmetric benchmark setups that explore various ways in which charginos and sleptons produce leptons in the final state.

MODERN PHYSICS LETTERS A (2021)

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Article Astronomy & Astrophysics

Linearized second law of black hole thermodynamics for gravitational theory with higher-order interactions of matter fields

Xin-Yang Wang, Jie Jiang

Summary: In the gravitational theory with second-order interactions between gravity, scalar, and electromagnetic fields, a black hole entropy expression satisfying the linearized second law of black hole thermodynamics has been derived. By extending the gravitational theory to include higher-order interactions, the general expression of black hole entropy satisfying the linearized second law is obtained.

PHYSICAL REVIEW D (2023)

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Article Astronomy & Astrophysics

Gravity with dynamical torsion

M. O. Katanaev

Summary: The paper introduces four simple Lagrangians for gravity models with dynamical torsion that do not have ghosts or tachyons, and which propagate two massive or massless particles of spin 1(+/-) and 0(+/-) through torsion, in addition to the massless graviton 2(+) propagated by metric.

CLASSICAL AND QUANTUM GRAVITY (2021)

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Article Astronomy & Astrophysics

The appearance of non trivial torsion for some Ricci dependent theories in the Palatini formalism

Juliana Osorio, Osvaldo P. Santillan

Summary: As known from the studies of gravity models, two different definitions of the generalized Ricci tensor exist. Previous research kept the connection free and found that torsion only appeared as a projective mode. This study investigated the scenario where the Lagrangian depends on the other possible Ricci tensor. The results showed that even in low dimensional spacetime, non-zero torsion could exist. The presence of torsion may be beneficial for ensuring the well-posedness of the equations of motion.

CLASSICAL AND QUANTUM GRAVITY (2022)

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Review Astronomy & Astrophysics

Fundamental Theory of Torsion Gravity

Luca Fabbri

Summary: This work explores the general differential geometry of a background with both torsion and curvature in space-time, and studies the role of torsion in keeping spinors in stable configurations by decomposing spinors into their chiral projections. It then applies this theory to solve specific system problems and discusses gravitational singularity formation, positivity of energy, Pauli exclusion principle, and macroscopic approximation. Finally, it investigates open problems in standard models of particles and cosmology using torsion dynamics to provide potential solutions.

UNIVERSE (2021)

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Article Astronomy & Astrophysics

Possible fluid interpretation and tidal force equation on a generic null hypersurface in Einstein-Cartan theory

Sumit Dey, Bibhas Ranjan Majhi

Summary: The dynamical evolution of the Hajicek 1-form in the Einstein-Cartan (EC) theory is derived. A possible fluid interpretation of the evolution equation is proposed, which resembles the Cosserat generalization of the Navier-Stokes fluid. Additionally, an alternative viewpoint using the Lie derivative instead of the usual material derivative is suggested. The tidal force equation on the null surface in EC theory is also derived.

PHYSICAL REVIEW D (2022)

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Article Physics, Particles & Fields

Three-dimensional teleparallel Chern-Simons supergravity theory

Ricardo Caroca, Patrick Concha, Diego Penafiel, Evelyn Rodriguez

Summary: In this work, a gauge-invariant three-dimensional teleparallel supergravity theory is presented using the Chern-Simons formalism. The theory describes a non-Riemannian geometry with non-vanishing torsion, where the cosmological constant is considered a source for the torsion. With the presence of supersymmetry, the theory reproduces the Poincare supergravity in the limit of vanishing cosmological constant and explores the extension to N = p + q supersymmetries.

EUROPEAN PHYSICAL JOURNAL C (2021)

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Article Mathematics, Applied

Weyl and Majorana Spinors as Pure Goldstone Bosons

Luca Fabbri

Summary: The paper investigates the structure of general spinors in polar form and finds that Weyl and Majorana spinors can be interpreted as pure Goldstone states, without any real degree of freedom.

ADVANCES IN APPLIED CLIFFORD ALGEBRAS (2022)

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Article Astronomy & Astrophysics

Spinor fields in f(Q)-gravity

Stefano Vignolo, Sante Carloni, Roberto Cianci, Fabrizio Esposito, Luca Fabbri

Summary: This study presents a tetrad-affine approach to investigate the coupling between f(Q) gravity and spinor fields of spin-1/2. Field equations and the conservation law of spin density are derived. The study focuses on Bianchi type-I cosmological models and provides a general procedure to solve the corresponding field equations. Analytical solutions are obtained in the case of f(Q) = alpha Q(n), showing isotropization at late times and the possibility of accelerated expansion depending on the exponent n.

CLASSICAL AND QUANTUM GRAVITY (2022)

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Article Astronomy & Astrophysics

A Note on Singularity Avoidance in Fourth-Order Gravity

Luca Fabbri

Summary: We use the fourth-order differential theory of gravitation to address the issue of singularity avoidance, specifically studying the short-distance behavior in the case of black holes and the big bang.

UNIVERSE (2022)

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Article Multidisciplinary Sciences

Exploiting new classes of mass-dimension one fermions

Rodolfo Jose Bueno Rogerio, Luca Fabbri

Summary: In this paper, a new class of spin-half mass-dimension one fermions is obtained using the machinery introduced in Ahluwalia (Ahluwalia 2020. Phys. Eng. Sci. 476, 20200249. (doi:10.1098/rspa.2020.0249) and EPL 131, 41001. (doi:10.1209/0295-5075/131/41001)). These spinors, after a suitable dual structure examination, can serve as expansion coefficients for a local field.

PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES (2022)

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Article Multidisciplinary Sciences

Symmetry Breaking of Universal Type and Particular Types

Luca Fabbri

Summary: This article investigates the concepts of symmetry and its breakdown from two different perspectives. It discusses the universal asymmetry resulting from a special configuration in the first case, using an example from the standard model of particles and its consequences for cosmological scenarios. In the second case, it explores specific solutions for particle dynamics and an example of a toy model of entangled spins.

SYMMETRY-BASEL (2022)

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Article Astronomy & Astrophysics

Goldstone States as Non-Local Hidden Variables

Luca Fabbri

Summary: This article discusses the theory of spinor fields in polar form, focusing on separating the true degrees of freedom of spinors from their Goldstone states. It is shown that these degrees of freedom contain information about rotation that is independent of gravitation. A model of entangled spins is constructed using this theory, where a singlet possesses a uniform rotation that collapses simultaneously regardless of spatial distance. Similar models of entangled polarizations are also discussed, along with an analogy to the double-slit experiment. General comments on Goldstone states are provided.

UNIVERSE (2022)

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Article Physics, Multidisciplinary

de Broglie-Bohm Formulation of Dirac Fields

Luca Fabbri

Summary: This article presents the theory of Dirac spinors in the formulation proposed by Bohm based on the idea of de Broglie. It re-writes the quantum relativistic matter field as a special type of classical fluid, demonstrating how a relativistic environment can encompass the non-local aspects of the hidden variables theory.

FOUNDATIONS OF PHYSICS (2022)

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Article Mathematics, Applied

Necessity of Tensorial Connections for Spinorial Systems

Luca Fabbri

Summary: In this article, we investigate tensorial connection for spinorial fields in polar form in various physical situations. We demonstrate that the tensorial connection is a useful tool in some cases, while in other cases, it is a necessary object. We compare and analyze different cases with a tensorial connection, exploring the analogies between space-time structures. Furthermore, we provide comments on quantum field theory and specific spinors.

ADVANCES IN APPLIED CLIFFORD ALGEBRAS (2023)

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Article Astronomy & Astrophysics

Torsionally-Induced Stability in Spinors

Luca Fabbri

Summary: In this paper, we investigate the role of the torsion axial-vector in the dynamics of Dirac spinor fields. We demonstrate that the torsional correction leads to effects that regularize the otherwise singular distribution of spinorial matter fields. Finally, we provide comments on the implications for physics.

UNIVERSE (2023)

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Article Mathematics, Applied

Propagators Beyond The Standard Model

Rodolfo Jose Bueno Rogerio, Luca Fabbri

Summary: In this paper, we investigate a versatile field propagator that can accommodate both newly-defined mass-dimension 1 fermions and spin-1/2 bosons. Our approach involves defining a mapping between spinors of different Lounesto classes and expressing the propagator in terms of the corresponding dual structures.

ADVANCES IN APPLIED CLIFFORD ALGEBRAS (2023)

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Article Physics, Multidisciplinary

Dirac Theory in Hydrodynamic Form

Luca Fabbri

Summary: We investigate the hydrodynamic formulation of quantum mechanics for relativistic spinor fields and find that the commonly defined velocity cannot accurately represent the tangent vector to particle trajectories. We propose an alternative definition for the tangent vector and hence particle trajectories, which we believe to be novel and unique. These findings are a crucial step towards addressing additional challenges such as defining trajectories for multi-particle systems or ensembles, as they have numerous applications and implications in quantum mechanics.

FOUNDATIONS OF PHYSICS (2023)

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Article Nanoscience & Nanotechnology

Accurate determination of band tail properties in amorphous semiconductor thin film with Kelvin probe force microscopy

Luca Fabbri, Camilla Bordoni, Pedro Barquinha, Jerome Crocco, Beatrice Fraboni, Tobias Cramer

Summary: The disordered microscopic structure of amorphous semiconductors leads to the formation of band tails in the density of states (DOS), which greatly affect charge transport properties. Kelvin Probe Force Microscopy (KPFM) is a powerful technique to measure the DOS, but lacks a model to interpret KPFM spectroscopy data on amorphous semiconductors of finite thickness. In this study, an analytical solution to the Poisson equation is provided for a metal-insulator-semiconductor junction interacting with the atomic force microscope tip, allowing for the fitting of experimental data and obtaining DOS parameters. This method was demonstrated on Indium-Gallium-Zinc Oxide (IGZO) thin-film transistors (IGZO-TFTs) and showed good agreement with values obtained from photocurrent spectroscopy.

APL MATERIALS (2023)

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Editorial Material Astronomy & Astrophysics

Editorial for the Special Issue Torsion-Gravity and Spinors in Fundamental Theoretical Physics

Luca Fabbri

UNIVERSE (2023)

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Article Multidisciplinary Sciences

Dirac Hydrodynamics in 19 Forms

Luca Fabbri

Summary: This article discusses the re-formulation of relativistic spinor field theory in polar variables, allowing for interpretation in terms of fluid variables. The dynamics of spinor fields are then converted into a special type of spin fluid dynamics. The authors demonstrate that this conversion into dynamical spin fluid is not unique, but can be achieved through 19 different rearrangements, as evidenced by the 19 minimal systems of hydrodynamic equations equivalent to the Dirac equations.

SYMMETRY-BASEL (2023)

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Article Physics, Multidisciplinary

Relativistic dynamical inversion in manifestly covariant form

Andre G. Campos, Luca Fabbri

Summary: In this study, the relativistic dynamical inversion technique is used to find analytical solutions to the Dirac equation in explicitly covariant form. The technique is demonstrated by making a change from Cartesian to spherical coordinates for a given Dirac spinor. The study also constructs a family of normalizable analytic solutions and identifies exact solutions for specific cases involving magnetic and electric fields.

PHYSICAL REVIEW RESEARCH (2022)

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