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Most embeddings of the Standard Model into a more unified theory, in particular the ones based on supergravity or superstrings, predict the existence of a hidden sector of particles which have only very weak interactions with the visible…

High Energy Physics - Phenomenology · Physics 2015-05-18 Joerg Jaeckel , Andreas Ringwald

The situation in particle physics after the discovery of the Higgs boson is discussed. Is the Standard Model complete? Are there still mysteries which have no answer? Answering these questions we consider the Higgs sector, the neutrino…

High Energy Physics - Phenomenology · Physics 2015-06-19 Dmitry Kazakov

Particle colliders have arguably been the most important instruments for particle physics over the past 50 years. As they became more powerful, they were used to push the frontier of our knowledge into previously uncharted territory. The…

Accelerator Physics · Physics 2021-03-22 Kenneth Long , Donatella Lucchesi , Mark Palmer , Nadia Pastrone , Daniel Schulte , Vladimir Shiltsev

We study a simple effective field theory incorporating six heavy vector bosons together with the standard-model field content. The new particles preserve custodial symmetry as well as an approximate left-right parity symmetry. The enhanced…

High Energy Physics - Phenomenology · Physics 2016-02-17 Thomas Appelquist , Yang Bai , James Ingoldby , Maurizio Piai

The main aim of the the Large Hadron Collider (LHC) experiments is to search for exotic particles with masses in the TeV range as predicted by Beyond Standard Model (BSM) theories. However, there is no hint of BSM around TeV scale so far.…

High Energy Physics - Phenomenology · Physics 2024-12-20 Nilanjana Kumar

We propose a new method for neutrino mass generation through a modified Higgs mechanism by introducing an additional tiny vacuum breaking to the charged Higgs field. With identical particle spectrum as standard electroweak model, this…

High Energy Physics - Phenomenology · Physics 2020-06-09 Yanbin Deng , Changyu Huang , Yong-Chang Huang

We extend the standard model with two iso-singlet color triplet scalars, one singlet real scalar and one singlet fermion. The new fields are odd under an unbroken Z_2 discrete symmetry while the standard model particles are even. The decays…

High Energy Physics - Phenomenology · Physics 2008-11-26 Pei-Hong Gu

The Standard Model of particle physics encapsulates our current best understanding of physics at the smallest distances and highest energies. It incorporates Quantum Electrodynamics (the quantised version of Maxwell's electromagnetism) and…

High Energy Physics - Experiment · Physics 2016-09-28 Jon Butterworth

The mechanism of particle mass generation in the Standard Model is discussed. It is shown that non-zero vacuum expectation value of a scalar field together with the proper symmetry of the Lagrangian allow a certain class of scalar field…

High Energy Physics - Phenomenology · Physics 2008-05-21 Andrej B. Arbuzov , Lukasz A. Glinka , Victor N. Pervushin

We consider a model of an elementary particle as a 2 + 1 dimensional brane evolving in a 3 + 1 dimensional space. Introducing gauge fields that live in the brane as well as normal surface tension can lead to a stable "elementary particle"…

General Relativity and Quantum Cosmology · Physics 2008-11-26 E. I. Guendelman , Jacov Portnoy

We discuss a possibility to explain the LHC diphoton excesses at $750$GeV by the new scalar $X$ that couples to the gauge bosons through the loop of new massive particles with Standard Model charges. We assume that the new particles decay…

High Energy Physics - Phenomenology · Physics 2016-07-13 Yuta Hamada , Hikaru Kawai , Kiyoharu Kawana , Koji Tsumura

After the Higgs discovery, the question of whether particles beyond those of the Standard Model exist is more pressing than ever. In this context, the scalar sector is particularly promising, since it lies at the core of the internal…

High Energy Physics - Phenomenology · Physics 2026-05-07 Andreas Crivellin , Saiyad Ashanujjaman , Sumit Banik , Siddharth P. Maharathy , Guglielmo Coloretti

The mechanism of elementary particle mass generation is a fundamental issue of physics. While cardinal progress has recently been achieved in the case of leptons and current quarks through the Brout-Engler-Higgs mechanism, this issue is at…

High Energy Physics - Phenomenology · Physics 2023-03-23 Vladimir I. Komarov

The precise knowledge of the Standard Model Higgs boson and top quark masses and couplings are crucial to understand the physics beyond it. SM like Higgs boson having mass in the range of 123-127 GeV squeezes the parameters for beyond…

High Energy Physics - Phenomenology · Physics 2014-04-03 Joydeep Chakrabortty , Partha Konar , Tanmoy Mondal

Massive scalar particle production, due to the anisotropic evolution of a five-dimensional spacetime, is considered in the context of a quadratic Lagrangian theory of gravity. Those particles, corresponding to field modes with non-vanishing…

General Relativity and Quantum Cosmology · Physics 2014-11-17 K. Kleidis , D. B. Papadopoulos

The mystery of the origin of the mass of the elementary particles persists despite the success of quantum field theories to the highest level of accuracy. Renormalization program has been the essential part of the calculation of the…

General Physics · Physics 2022-01-27 Eue-Jin Jeong

The standard model of the elementary particles is built on several assumptions. The Higgs is assumed to be a scalar, a boson, with the charges of a fermion (in the fundamental representations of the charge groups). No explanation is offered…

High Energy Physics - Phenomenology · Physics 2011-12-20 Norma Susana Mankoc Borstnik

The ``preon-trinity'' model for the compositeness of leptons, quarks and heavy vector bosons predicts several new heavy leptons and quarks. Three of them can be produced in $e^{+}e^{-}$ annihilations at CERN LEP energies, since they can be…

High Energy Physics - Phenomenology · Physics 2007-12-21 Erik Elfgren , Sverker Fredriksson

I present a concise review of the Higgs problem which plays a central role in particle physics today. The Higgs of the minimal Standard Model is so far just a conjecture that needs to be verified or discarded at the LHC. Probably the…

High Energy Physics - Phenomenology · Physics 2015-05-18 Guido Altarelli

A descriptive summary is given of the results to-date from the framed standard model (FSM) which: (i) assigns geometric meaning to the Higgs field and to fermion generations, hence offering an explanation for the observed mass and mixing…

High Energy Physics - Phenomenology · Physics 2019-01-30 José BORDES , CHAN Hong-Mo , TSOU Sheung Tsun