scholarly journals SPECIAL RELATIVITY WITH TWO INVARIANT SCALES: MOTIVATION, FERMIONS, BOSONS, LOCALITY, AND CRITIQUE

2004 ◽  
Vol 13 (02) ◽  
pp. 335-345 ◽  
Author(s):  
D. V. AHLUWALIA-KHALILOVA
Keyword(s):  
High Energy Physics ◽  
Fundamental Constant ◽  
High Energy ◽  
Local Theory ◽  
Formal Element ◽  
The Standard Model ◽  
Physical Importance ◽  
Non Local ◽  
The Subject ◽  
Energy Physics

We present a Master equation for description of fermions and bosons for special relativities with two invariant scales, [Formula: see text], (c and λP). We introduce canonically-conjugate variables (χ0,χ) to (∊,π) of Judes-Visser. Together, they bring in a formal element of linearity and locality in an otherwise non-linear and non-local theory. Special relativities with two invariant scales provide all corrections, say, to the standard model of the high energy physics, in terms of one fundamental constant, λP. It is emphasized that spacetime of special relativities with two invariant scales carries an intrinsic quantum-gravitational character. In an addenda, we also comment on the physical importance of a phase factor that the whole literature on the subject has missed and present a brief critique of [Formula: see text]. In addition, we remark that the most natural and physically viable [Formula: see text] shall require momentum-space and spacetime to be non-commutative with the non-commutativity determined by the spin content and C, P, and T properties of the examined representation space. Therefore, in a physically successful [Formula: see text], the notion of spacetime is expected to be deeply intertwined with specific properties of the test particle.

scholarly journals CALCULATING TWO- AND THREE-BODY DECAYS WITH FeynArts AND FormCalc

2003 ◽  
Vol 14 (09) ◽  
pp. 1273-1278 ◽  
Author(s):  
MICHAEL KLASEN
Keyword(s):  
Standard Model ◽  
Particle Production ◽  
High Energy Physics ◽  
High Energy ◽  
Energy Distributions ◽  
Particle Decay ◽  
The Standard Model ◽  
Decay Widths ◽  
Three Body ◽  
Energy Physics

The Feynman diagram generator FeynArts and the computer algebra program FormCalc allow for an automatic computation of 2→2 and 2→3 scattering processes in High Energy Physics. We have extended this package by four new kinematical routines and adapted one existing routine in order to accomodate also two- and three-body decays of massive particles. This makes it possible to compute automatically two- and three-body particle decay widths and decay energy distributions as well as resonant particle production within the Standard Model and the Minimal Supersymmetric Standard Model at the tree- and loop-level. The use of the program is illustrated with three standard examples: [Formula: see text], [Formula: see text], and [Formula: see text].

scholarly journals Natural philosophy versus philosophy of naturalness

2020 ◽  
Vol 35 (18) ◽  
pp. 2030006 ◽  
Author(s):  
Goran Senjanović
Keyword(s):  
Particle Physics ◽  
High Energy Physics ◽  
Natural Philosophy ◽  
High Energy ◽  
Beyond The Standard Model ◽  
Hierarchy Problem ◽  
Guiding Principle ◽  
The Standard Model ◽  
New Phenomena ◽  
Energy Physics

I reflect on some of the basic aspects of present day Beyond the Standard Model particle physics, focusing mostly on the issues of naturalness, in particular on the so-called hierarchy problem. To all of us, physics as natural science emerged with Galileo and Newton, and led to centuries of unparalleled success in explaining and often predicting new phenomena of nature. I argue here that the long-standing obsession with the hierarchy problem as a guiding principle for the future of our field has had the tragic consequence of deviating high energy physics from its origins as natural philosophy, and turning it into a philosophy of naturalness.

scholarly journals THE FUTURE OF PARTICLE PHYSICS AS A NATURAL SCIENCE

1998 ◽  
Vol 13 (06) ◽  
pp. 863-886 ◽  
Author(s):  
FRANK WILCZEK
Keyword(s):  
Natural Science ◽  
Particle Physics ◽  
High Energy Physics ◽  
High Energy ◽  
Particle Interactions ◽  
Fundamental Particle ◽  
Current State ◽  
The Standard Model ◽  
Near Term ◽  
Energy Physics

In the first part of the paper, I give a low-resolution overview of the current state of particle physics — the triumph of the Standard Model and its discontents. I review and re-endorse the remarkably direct and (to me) compelling argument that existing data, properly interpreted, point toward a unified theory of fundamental particle interactions and toward low-energy supersymmetry as the near-term future of high energy physics as a natural science. I then attempt, as requested, some more "visionary" — i.e. even lower resolution — comments about the farther future. In that spirit, I emphasize the continuing importance of condensed matter physics as a source of inspiration and potential application, in particular for expansion of symmetry concepts, and of cosmology as a source of problems, applications, and perhaps ultimately limitations.

scholarly journals THE SEARCH FOR, AND DISCOVERY OF, THE HIGGS BOSON AT CMS

2013 ◽  
Vol 28 (02) ◽  
pp. 1330003 ◽  
Author(s):  
DANIEL GREEN
Keyword(s):  
Higgs Boson ◽  
High Energy Physics ◽  
Hadron Collider ◽  
Higgs Field ◽  
High Energy ◽  
Higgs Particle ◽  
The Standard Model ◽  
Future Data ◽  
Low Mass ◽  
Energy Physics

The Higgs field was first proposed almost 50 years ago. Twenty years ago the tools needed to discover the Higgs boson, the large hadron collider and the CMS and ATLAS experiments, were initiated. Data taking was begun in 2010 and culminated in the announcement of the discovery of a "Higgs-like" boson on 4 July 2012. This discovery completes the Standard Model (SM) of high energy physics, if it is indeed the hypothesized SM Higgs particle. Future data taking will explore the properties of the new 125 GeV particle to see if it has all the attributes of an SM Higgs and to explore the mechanism that maintains its "low" mass.

scholarly journals Naturalness and Emergence

The Monist ◽  
2019 ◽  
Vol 102 (4) ◽  
pp. 499-524
Author(s):  
David Wallace
Keyword(s):  
Standard Model ◽  
High Energy Physics ◽  
High Energy ◽  
Fine Tuning ◽  
Entire Structure ◽  
The Standard Model ◽  
Intertheoretic Reduction ◽  
Energy Physics

Abstract I develop an account of naturalness (that is, approximately: lack of extreme fine-tuning) in physics which demonstrates that naturalness assumptions are not restricted to narrow cases in high-energy physics but are a ubiquitous part of how interlevel relations are derived in physics. After exploring how and to what extent we might justify such assumptions on methodological grounds or through appeal to speculative future physics, I consider the apparent failure of naturalness in cosmology and in the Standard Model. I argue that any such naturalness failure threatens to undermine the entire structure of our understanding of intertheoretic reduction, and so risks a much larger crisis in physics than is sometimes suggested; I briefly review some currently-popular strategies that might avoid that crisis.

SEARCHES FOR THE STANDARD MODEL HIGGS BOSON AT THE CDF EXPERIMENT

2009 ◽  
Vol 24 (04) ◽  
pp. 617-656
Author(s):  
SONG-MING WANG
Keyword(s):  
Higgs Boson ◽  
Standard Model ◽  
High Energy Physics ◽  
High Energy ◽  
Electroweak Symmetry ◽  
The Past ◽  
The Standard Model ◽  
Using Data ◽  
Near Future ◽  
Energy Physics

The understanding of the dynamics behind the breaking of the electroweak symmetry is one of the most important goals in the field of high energy physics. In the Standard Model (SM) Higgs mechanism plays a key role in the symmetry breaking, one manifestation of which is spin-0 Higgs boson. Thus the search for the Higgs boson is one of the flag-ship analyses at the Tevatron. Over the past few years the CDF experiment has made significant improvements in its sensitivity on the search for the SM Higgs boson. In this paper we summarize CDF's most recent results on the searches for the SM Higgs boson production at the Tevatron using data samples of integrated luminosities up to 3 fb-1. We also present the Tevatron's latest combined results on the SM Higgs boson search, and discuss the possibility that it could be found at the Tevatron in the near future.

scholarly journals Introduction

2003 ◽  
pp. 1-15 ◽  
Author(s):  
Michiko G. Minty ◽  
Frank Zimmermann
Keyword(s):  
High Energy Physics ◽  
High Energy ◽  
Particle Accelerators ◽  
Maximum Benefit ◽  
Microscopic Probe ◽  
The Subject ◽  
Structure Of Matter ◽  
Achieve Maximum Benefit ◽  
Energy Physics ◽  
Accelerated Particles

AbstractParticle accelerators were originally developed for research in nuclear and high-energy physics for probing the structure of matter. Over the years advances in technology have allowed higher and higher particle energies to be attained thus providing an ever more microscopic probe for understanding elementary particles and their interactions. To achieve maximum benefit from such accelerators, measuring and controlling the parameters of the accelerated particles is essential. This is the subject of this book.

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