High Energy Particle Physics

1807 Submissions

[17] viXra:1807.0343 [pdf] submitted on 2018-07-19 12:59:18

Massive Sterile (Ghost) Neutrino Equation, MSN

Authors: Vito R. D'Angelo
Comments: 2 Pages.

It is postulated that the massive sterile (ghost) neutrino, symbol MSN, has a mass of 6.64743835x10^-33 kg. Utilizing the standard model equation of the electron rest mass divided by the inverse fine structure constant, within the 2014 NIST CODATA uncertainty limits.
Category: High Energy Particle Physics

[16] viXra:1807.0281 [pdf] replaced on 2018-07-17 12:28:28

„Neutrinos, Luxons, Preons, Quantons, Strangelets and Twistors Like a Dark Matter and Dark Energy, Feat. Mr. NEUTRINO“

Authors: Imrich Krištof
Comments: 26 Pages.

This article is focused on the most non–clarified situation of Particle Physics, like for example Neutrinos, Quantons, Preons, Luxons and subatomic and atomic scales microphenomenons Twistors and Strangelets. The main part of this article is dedicated to dark matter and energy and flashback significance of Mr. Neutrino, respectively the outstanding atomic scientist Bruno Pontecorvo and his contribution to High Energy Particle Physics and Nuclear Physics, by his discoveries in scientific field, so called NEUTRINO OSCILLATIONS and other quantum phenomenas. Although this article says about, for example – mixing angles θ [théta] of neutrinos, their “VIRTUAL TRANSMUTATION”, DIRAC AND MAJORANA NEUTRINOS. The most interesting part of the text is focused on infraparticles – goldstinos and preons–models of lepton, quarks and gauge bosons as composite objects. Not in the ending part of this text is described, also, so called – The Suzuki Model (Lagrangian Based Suzuki’s Ideas). Included is also new concept of wave particle duality – wavicle and quanticle (including wave + particle). The text involved the briefly biography of Mr. Neutrino respectively nuclear scientist Bruno Pontecorvo.
Category: High Energy Particle Physics

[15] viXra:1807.0273 [pdf] submitted on 2018-07-16 08:50:26

Neutron Spin Structure, Yang-Mills Theory, and the Mass Gap

Authors: Peter Cameron
Comments: 2 Pages. submitted to the 23rd International Spin Symposium in Ferrara, Italy (September 2018)

An analysis of proton structure and spin based upon an electromagnetic model of geometric wavefunction interactions was presented to Spin 2016. A key point of that analysis was the supposition that only observed components of the eight-component Pauli wavefunction (electric charge, magnetic flux quantum, and magnetic moment) comprise the stable proton wavefunction. The dark components (magnetic charge, electric flux quantum, electric moment) cannot couple to the photon due to topological symmetry breaking of pseudoscalar magnetic charge. Their impedance mismatch to the vacuum wavefunction and the resulting differential phase shift is the causal agent of decoherence, rendering wavefunctions containing dark components unstable. An unstable neutron wavefunction might then be extracted from the S-matrix by swapping one or more dark components for visible. Several possibilities exist. This Spin 2018 abstract submission proposes to explore those possibilities, in hope of extending the Spin 2016 analysis to the neutron geometric wavefunction, thereby improving understanding of the anomalous moment and illuminating the foundation of this Yang-Mills isospin pair.
Category: High Energy Particle Physics

[14] viXra:1807.0248 [pdf] submitted on 2018-07-13 13:08:35

Muon Magnetic Anomaly

Authors: George Rajna
Comments: 23 Pages.

National Laboratory and their collaborators have just released the most precise prediction of how subatomic particles called muons—heavy cousins of electrons— "wobble" off their path in a powerful magnetic field. [14] Muons are mysterious, and scientists are diving deep into the particle to get a handle on a property that might render it—and the universe—a little less mysterious. [13] For elementary particles, such as muons or neutrinos, the magnetic force applied to such charges is unique and immutable. However, unlike the electric charge, the magnetic force strength is not quantised. [12] Particle physics and decorative glassware are two disciplines that don't often meet. But given the striking results of a recent artist-scientist collaboration, perhaps that could change. [11] Physicists at Chalmers University of Technology and Free University of Brussels have now found a method to significantly enhance optical force. [10] Nature Communications today published research by a team comprising Scottish and South African researchers, demonstrating entanglement swapping and teleportation of orbital angular momentum 'patterns' of light. [9] While physicists are continually looking for ways to unify the theory of relativity, which describes large-scale phenomena, with quantum theory, which describes small-scale phenomena, computer scientists are searching for technologies to build the quantum computer using Quantum Information. In August 2013, the achievement of "fully deterministic" quantum teleportation, using a hybrid technique, was reported. On 29 May 2014, scientists announced a reliable way of transferring data by quantum teleportation. Quantum teleportation of data had been done before but with highly unreliable methods. The accelerating electrons explain not only the Maxwell Equations and the Special Relativity, but the Heisenberg Uncertainty Relation, the Wave-Particle Duality and the electron's spin also, building the Bridge between the Classical and Quantum Theories. The Planck Distribution Law of the electromagnetic oscillators explains the electron/proton mass rate and the Weak and Strong Interactions by the diffraction patterns. The Weak Interaction changes the diffraction patterns by moving the electric charge from one side to the other side of the diffraction pattern, which violates the CP and Time reversal symmetry. The diffraction patterns and the locality of the self-maintaining electromagnetic potential explains also the Quantum Entanglement, giving it as a natural part of the Relativistic Quantum Theory and making possible to build the Quantum Computer with the help of Quantum Information.
Category: High Energy Particle Physics

[13] viXra:1807.0241 [pdf] submitted on 2018-07-12 07:28:47

Ultrashort Electron Flashes on Nucleus

Authors: George Rajna
Comments: 34 Pages.

The group led by Fabrizio Carbone at EPFL and international colleagues have used ultrafast transmission electron microscopy to take attosecond energy-momentum resolved snapshots (1 attosecond = 10-18 or quintillionths of a second) of a free-electron wave function. [25] Now, physicists are working toward getting their first CT scans of the inner workings of the nucleus. [24] The process of the sticking together of quarks, called hadronisation, is still poorly understood. [23] In experimental campaigns using the OMEGA EP laser at (MIT) researchers took radiographs of the shock front, similar to the X-ray radiology in hospitals with protons instead of X-rays. [22] Researchers generate proton beams using a combination of nanoparticles and laser light. [21] Devices based on light, rather than electrons, could revolutionize the speed and security of our future computers. However, one of the major challenges in today's physics is the design of photonic devices, able to transport and switch light through circuits in a stable way. [20] Researchers characterize the rotational jiggling of an optically levitated nanoparticle, showing how this motion could be cooled to its quantum ground state. [19] Researchers have created quantum states of light whose noise level has been " squeezed " to a record low. [18] An elliptical light beam in a nonlinear optical medium pumped by " twisted light " can rotate like an electron around a magnetic field. [17] Physicists from Trinity College Dublin's School of Physics and the CRANN Institute, Trinity College, have discovered a new form of light, which will impact our understanding of the fundamental nature of light. [16] Light from an optical fiber illuminates the metasurface, is scattered in four different directions, and the intensities are measured by the four detectors. From this measurement the state of polarization of light is detected. [15]
Category: High Energy Particle Physics

[12] viXra:1807.0225 [pdf] submitted on 2018-07-11 08:14:20

Top Quarks Spin Together

Authors: George Rajna
Comments: 15 Pages.

By measuring the angles between the top and antitop decay particles, the ATLAS experiment at CERN has not only measured this degree of correlation, but found it to be higher than what is predicted by calculations based on the Standard Model. [10] Higgs boson decaying into bottom quarks. Now, scientists are tackling its relationship with the top quark. [9] Usha Mallik and her team used a grant from the U.S. Department of Energy to help build a sub-detector at the Large Hadron Collider, the world's largest and most powerful particle accelerator, located in Switzerland. They're running experiments on the sub-detector to search for a pair of bottom quarks— subatomic yin-and-yang particles that should be produced about 60 percent of the time a Higgs boson decays. [8] A new way of measuring how the Higgs boson couples to other fundamental particles has been proposed by physicists in France, Israel and the US. Their technique would involve comparing the spectra of several different isotopes of the same atom to see how the Higgs force between the atom's electrons and its nucleus affects the atomic energy levels. [7] The magnetic induction creates a negative electric field, causing an electromagnetic inertia responsible for the relativistic mass change; it is the mysterious Higgs Field giving mass to the particles. The Planck Distribution Law of the electromagnetic oscillators explains the electron/proton mass rate by the diffraction patterns. The accelerating charges explain not only the Maxwell Equations and the Special Relativity, but the Heisenberg Uncertainty Relation, the wave particle duality and the electron's spin also, building the bridge between the Classical and Relativistic Quantum Theories. The self maintained electric potential of the accelerating charges equivalent with the General Relativity space-time curvature, and since it is true on the quantum level also, gives the base of the Quantum Gravity. The diffraction patterns and the locality of the self-maintaining electromagnetic potential explains also the Quantum Entanglement, giving it as a natural part of the relativistic quantum theory.
Category: High Energy Particle Physics

[11] viXra:1807.0200 [pdf] submitted on 2018-07-09 08:18:25

W and Z Bosons Emitted by Quarks

Authors: George Rajna
Comments: 78 Pages.

Two among the rarest processes probed so far at the Large Hadron Collider, the scattering between W and Z bosons emitted by quarks in proton-proton collisions, have been established by the ATLAS experiment at CERN. [42] Plasma particle accelerators more powerful than existing machines could help probe some of the outstanding mysteries of our universe, as well as make leaps forward in cancer treatment and security scanning—all in a package that's around a thousandth of the size of current accelerators. [41] The Department of Energy's SLAC National Accelerator Laboratory has started to assemble a new facility for revolutionary accelerator technologies that could make future accelerators 100 to 1,000 times smaller and boost their capabilities. [40] The authors designed a mechanism based on the deployment of a transport barrier to confine the particles and prevent them from moving from one region of the accelerator to another. "There is strong experimental evidence that there is indeed some new physics lurking in the lepton sector," Dev said. [38] Now, in a new result unveiled today at the Neutrino 2018 conference in Heidelberg, Germany, the collaboration has announced its first results using antineutrinos, and has seen strong evidence of muon antineutrinos oscillating into electron antineutrinos over long distances, a phenomenon that has never been unambiguously observed. [37] The Precision Reactor Oscillation and Spectrum Experiment (PROSPECT) has completed the installation of a novel antineutrino detector that will probe the possible existence of a new form of matter. [36] The MINERvA collaboration analyzed data from the interactions of an antineutrino— the antimatter partner of a neutrino—with a nucleus. [35] The inclusion of short-range interactions in models of neutrinoless double-beta decay could impact the interpretation of experimental searches for the elusive decay. [34]
Category: High Energy Particle Physics

[10] viXra:1807.0196 [pdf] submitted on 2018-07-09 10:08:44

Revolutionary Neutrino Detector

Authors: George Rajna
Comments: 72 Pages.

A revolutionary new kind of neutrino detector, designed in part by scientists from the U.S. Department of Energy's (DOE) Brookhaven National Laboratory, sits at the heart of the MicroBooNE experiment at DOE's Fermi National Accelerator Laboratory (Fermilab). [40] Researchers in Germany have started collecting data with a 60 million euro ($71 million) machine designed to help determine the mass of the universe's lightest particle. [39] By analyzing data collected over eight years ago, scientists at the U.S. Department of Energy's (DOE) Argonne National Laboratory and Fermi National Accelerator Laboratory have made a potentially groundbreaking discovery. [38] Now, in a new result unveiled today at the Neutrino 2018 conference in Heidelberg, Germany, the collaboration has announced its first results using antineutrinos, and has seen strong evidence of muon antineutrinos oscillating into electron antineutrinos over long distances, a phenomenon that has never been unambiguously observed. [37] The Precision Reactor Oscillation and Spectrum Experiment (PROSPECT) has completed the installation of a novel antineutrino detector that will probe the possible existence of a new form of matter. [36] The MINERvA collaboration analyzed data from the interactions of an antineutrino—the antimatter partner of a neutrino—with a nucleus. [35] The inclusion of short-range interactions in models of neutrinoless double-beta decay could impact the interpretation of experimental searches for the elusive decay. [34] The occasional decay of neutrons into dark matter particles could solve a long-standing discrepancy in neutron decay experiments. [33] The U.S. Department of Energy has approved funding and start of construction for the SuperCDMS SNOLAB experiment, which will begin operations in the early 2020s to hunt for hypothetical dark matter particles called weakly interacting massive particles, or WIMPs. [32]
Category: High Energy Particle Physics

[9] viXra:1807.0193 [pdf] submitted on 2018-07-09 10:57:35

On the Neutrino’s Model Based on Virtual Space-time and the New Neutrino Detecting Method

Authors: Zhi Cheng
Comments: 26 Pages. 5 figures. Include Chinese version

In this paper, I build a new neutrino model based on the hypothesis of existing of virtual space-time. I assume that a neutrino is a signal of special electromagnetic wave that across over the real and virtual space-time. I also analyze the interactions between neutrino and photon based on this new model. A new particles decay diagram was given for describing the interactions among neutrinos and parts of particles. I also assume a new neutrinos detecting method in this paper.
Category: High Energy Particle Physics

[8] viXra:1807.0180 [pdf] submitted on 2018-07-10 07:37:20

Higgs Boson Decaying to Bottom Quarks

Authors: George Rajna
Comments: 16 Pages.

ATLAS experiment reported a preliminary result establishing the observation of the Higgs boson decaying into pairs of b quarks, furthermore at a rate consistent with the Standard Model prediction. [9] Usha Mallik and her team used a grant from the U.S. Department of Energy to help build a sub-detector at the Large Hadron Collider, the world's largest and most powerful particle accelerator, located in Switzerland. They're running experiments on the sub-detector to search for a pair of bottom quarks— subatomic yin-and-yang particles that should be produced about 60 percent of the time a Higgs boson decays. [8] A new way of measuring how the Higgs boson couples to other fundamental particles has been proposed by physicists in France, Israel and the US. Their technique would involve comparing the spectra of several different isotopes of the same atom to see how the Higgs force between the atom's electrons and its nucleus affects the atomic energy levels. [7] The magnetic induction creates a negative electric field, causing an electromagnetic inertia responsible for the relativistic mass change; it is the mysterious Higgs Field giving mass to the particles. The Planck Distribution Law of the electromagnetic oscillators explains the electron/proton mass rate by the diffraction patterns. The accelerating charges explain not only the Maxwell Equations and the Special Relativity, but the Heisenberg Uncertainty Relation, the wave particle duality and the electron's spin also, building the bridge between the Classical and Relativistic Quantum Theories. The self maintained electric potential of the accelerating charges equivalent with the General Relativity space-time curvature, and since it is true on the quantum level also, gives the base of the Quantum Gravity. The diffraction patterns and the locality of the self-maintaining electromagnetic potential explains also the Quantum Entanglement, giving it as a natural part of the relativistic quantum theory.
Category: High Energy Particle Physics

[7] viXra:1807.0178 [pdf] submitted on 2018-07-10 08:06:45

Disconnectedness Experiments Negating the Validity of the Standard Model

Authors: Bowen Liu
Comments: 12 Pages.

In the history of physics it has no precedent the disconnectedness experiment that verifies physical object being outside of our geometry. The purpose of this paper is to provide crucial experiments to show that absolute connectedness assumption the Standard Model relied on is invalid, and to negate the validity of the Standard Model. The disconnectedness experiment negates the nonempty intersection between current geometry and micro-geometry in the depth direction and transitional region between them, and shows that micro-geometry disconnects to current geometry in the depth direction, micro-geometry is the other geometry outside current geometry, and the relationship between the two geometries can only be non-one-one mapping instead of evolution. The logical procedure of negating the validity of SM is as follows. (1) To give the definition of spatial disconnectedness in the depth direction and to determine the elements of the nonempty intersection. (2) To reduce every quantum experiment to reprocess disconnectedness experiment to prove that there is no non-empty intersection between the two geometries, i.e., they are not connected. (3) The spatial connectedness, among all geometrical concepts, is one of the most primitive topological concepts; once the spatial connectedness is invalid, all physical theories based on the connectedness are invalid, and the geometric foundation of SM is invalid. We complete the proof of the invalidity of the Standard Model. Our proof shows that all kinds of micro-forms (including Higgs particles) are secondary existing form of matter in current geometry, but not primitive form. The Standard Model, as a theory of extrinsic particles, is not the ultimate model of the universe physicists have coveted, but is idealist theory based on distorted idealization.
Category: High Energy Particle Physics

[6] viXra:1807.0166 [pdf] submitted on 2018-07-08 16:12:14

Cl(16) Physics: E8 Lagrangian and Fr3(O) String Theory

Authors: Frank Dodd Tony Smith Jr
Comments: 16 Pages.

Our Universe originated with Finkelstein Iteration of Real Clifford Algebras from the Void ( First Grothendieck Universe ) to Cl(16) ( Second Grothendieck Universe) whose BiVectors and two quarter-Spinors ( ++ and -- ) give E8 Physics and whose TriVectors give Fr3(O) String Theory leading to an Algebraic Quantum Field Theory ( AQFT ) that generalizes Hyperfinite II1 von Neumann factor Fock Space from 2-Periodic Complex Clifford Algebra to 8-Periodic Real Clifford Algebra to get the Third Grothendieck Universe.
Category: High Energy Particle Physics

[5] viXra:1807.0158 [pdf] submitted on 2018-07-09 06:06:18

Plasma Accelerator

Authors: George Rajna
Comments: 77 Pages.

Plasma particle accelerators more powerful than existing machines could help probe some of the outstanding mysteries of our universe, as well as make leaps forward in cancer treatment and security scanning—all in a package that's around a thousandth of the size of current accelerators. [41] The Department of Energy's SLAC National Accelerator Laboratory has started to assemble a new facility for revolutionary accelerator technologies that could make future accelerators 100 to 1,000 times smaller and boost their capabilities. [40] The authors designed a mechanism based on the deployment of a transport barrier to confine the particles and prevent them from moving from one region of the accelerator to another. "There is strong experimental evidence that there is indeed some new physics lurking in the lepton sector," Dev said. [38] Now, in a new result unveiled today at the Neutrino 2018 conference in Heidelberg, Germany, the collaboration has announced its first results using antineutrinos, and has seen strong evidence of muon antineutrinos oscillating into electron antineutrinos over long distances, a phenomenon that has never been unambiguously observed. [37] The Precision Reactor Oscillation and Spectrum Experiment (PROSPECT) has completed the installation of a novel antineutrino detector that will probe the possible existence of a new form of matter. [36] The MINERvA collaboration analyzed data from the interactions of an antineutrino— the antimatter partner of a neutrino—with a nucleus. [35] The inclusion of short-range interactions in models of neutrinoless double-beta decay could impact the interpretation of experimental searches for the elusive decay. [34] The occasional decay of neutrons into dark matter particles could solve a long-standing discrepancy in neutron decay experiments. [33]
Category: High Energy Particle Physics

[4] viXra:1807.0150 [pdf] submitted on 2018-07-07 09:01:58

Neutron-Rich Isotopes

Authors: George Rajna
Comments: 38 Pages.

CERN's nuclear physics facility, ISOLDE, has minted a new coin in its impressive collection of isotopes. [27] In the case of several light nuclei, experimental confirmation of the individualism or family nature of nucleons will now be simpler, thanks to predictions presented by Polish physicists from Cracow and Kielce. [26] The identification of the magic number of six provides an avenue to investigate the origin of spin–orbit splittings in atomic nuclei. [25] Now, physicists are working toward getting their first CT scans of the inner workings of the nucleus. [24] The process of the sticking together of quarks, called hadronisation, is still poorly understood. [23] In experimental campaigns using the OMEGA EP laser at (MIT) researchers took radiographs of the shock front, similar to the X-ray radiology in hospitals with protons instead of X-rays. [22] Researchers generate proton beams using a combination of nanoparticles and laser light. [21] Devices based on light, rather than electrons, could revolutionize the speed and security of our future computers. However, one of the major challenges in today's physics is the design of photonic devices, able to transport and switch light through circuits in a stable way. [20] Researchers characterize the rotational jiggling of an optically levitated nanoparticle, showing how this motion could be cooled to its quantum ground state. [19] Researchers have created quantum states of light whose noise level has been " squeezed " to a record low. [18] An elliptical light beam in a nonlinear optical medium pumped by " twisted light " can rotate like an electron around a magnetic field. [17] Physicists from Trinity College Dublin's School of Physics and the CRANN Institute, Trinity College, have discovered a new form of light, which will impact our understanding of the fundamental nature of light. [16]
Category: High Energy Particle Physics

[3] viXra:1807.0143 [pdf] submitted on 2018-07-08 04:57:25

Talk about the Higgs

Authors: George Rajna
Comments: 13 Pages.

It is six years ago that the discovery of the Higgs boson was announced, to great fanfare in the world's media, as a crowning success of CERN's Large Hadron Collider (LHC). [9] Usha Mallik and her team used a grant from the U.S. Department of Energy to help build a sub-detector at the Large Hadron Collider, the world's largest and most powerful particle accelerator, located in Switzerland. They're running experiments on the sub-detector to search for a pair of bottom quarks— subatomic yin-and-yang particles that should be produced about 60 percent of the time a Higgs boson decays. [8] A new way of measuring how the Higgs boson couples to other fundamental particles has been proposed by physicists in France, Israel and the US. Their technique would involve comparing the spectra of several different isotopes of the same atom to see how the Higgs force between the atom's electrons and its nucleus affects the atomic energy levels. [7] The magnetic induction creates a negative electric field, causing an electromagnetic inertia responsible for the relativistic mass change; it is the mysterious Higgs Field giving mass to the particles. The Planck Distribution Law of the electromagnetic oscillators explains the electron/proton mass rate by the diffraction patterns. The accelerating charges explain not only the Maxwell Equations and the Special Relativity, but the Heisenberg Uncertainty Relation, the wave particle duality and the electron's spin also, building the bridge between the Classical and Relativistic Quantum Theories. The self maintained electric potential of the accelerating charges equivalent with the General Relativity space-time curvature, and since it is true on the quantum level also, gives the base of the Quantum Gravity. The diffraction patterns and the locality of the self-maintaining electromagnetic potential explains also the Quantum Entanglement, giving it as a natural part of the relativistic quantum theory.
Category: High Energy Particle Physics

[2] viXra:1807.0120 [pdf] submitted on 2018-07-05 18:39:28

Putrescine, Cadaverine, Spermine and Spermidine – Enhanced Precatalyst Preparation Stabilization and Initiation (EPPSI) Nano Molecules.

Authors: Alireza Heidari, Ricardo Gobato
Comments: 14 Pages. Parana J. Sci. Educ., v.4, n.5, (1-14), July 1, 2018. ISSN 2447-6153

In the current study, we study Putrescine, Cadaverine, Spermine and Spermidine–Enhanced Precatalyst Preparation Stabilization and Initiation (EPPSI) Nano molecules incorporation into the Nano Polymeric Matrix (NPM) by immersion of the Nano Polymeric Modified Electrode (NPME) as molecular enzymes and drug targets for human cancer cells, tissues and tumors treatment under synchrotron and synchrocyclotron radiations.
Category: High Energy Particle Physics

[1] viXra:1807.0062 [pdf] submitted on 2018-07-02 06:26:33

Matter and Antimatter Light Interaction

Authors: George Rajna
Comments: 69 Pages.

It is one of the greatest mysteries in the universe: Why is there so much more matter than antimatter? [39] From the data collected by the LHCb detector at the Large Hadron Collider, it appears that the particles known as charm mesons and their antimatter counterparts are not produced in perfectly equal proportions. [38] The OPERA experiment, located at the Gran Sasso Laboratory of the Italian National Institute for Nuclear Physics (INFN), was designed to conclusively prove that muon-neutrinos can convert to tau-neutrinos, through a process called neutrino oscillation, whose discovery was awarded the 2015 Nobel Physics Prize. [37] The Precision Reactor Oscillation and Spectrum Experiment (PROSPECT) has completed the installation of a novel antineutrino detector that will probe the possible existence of a new form of matter. [36] The MINERvA collaboration analyzed data from the interactions of an antineutrino—the antimatter partner of a neutrino—with a nucleus. [35] The inclusion of short-range interactions in models of neutrinoless double-beta decay could impact the interpretation of experimental searches for the elusive decay. [34] The occasional decay of neutrons into dark matter particles could solve a long-standing discrepancy in neutron decay experiments. [33] The U.S. Department of Energy has approved funding and start of construction for the SuperCDMS SNOLAB experiment, which will begin operations in the early 2020s to hunt for hypothetical dark matter particles called weakly interacting massive particles, or WIMPs. [32] Thanks to low-noise superconducting quantum amplifiers invented at the University of California, Berkeley, physicists are now embarking on the most sensitive search yet for axions, one of today's top candidates for dark matter. [31]
Category: High Energy Particle Physics