Top Physics
... Why are we interested in top-quarks ? 2) Top-quarks ─ a sensitive tool to explore the electroweak symmetry breaking Top-quark plays special role in many extensions of the Standard Model, ideal tool to search for new physics ...
... Why are we interested in top-quarks ? 2) Top-quarks ─ a sensitive tool to explore the electroweak symmetry breaking Top-quark plays special role in many extensions of the Standard Model, ideal tool to search for new physics ...
Plasma Process 5 col..
... above drawing shows a moving particle colliding with a fixed target particle. The while figure further assumes that the target and moving particle are of the same type and/or size, they do not have to be so. In general, the direction that the particles travel after the collision will depend on the a ...
... above drawing shows a moving particle colliding with a fixed target particle. The while figure further assumes that the target and moving particle are of the same type and/or size, they do not have to be so. In general, the direction that the particles travel after the collision will depend on the a ...
33 PARTICLE PHYSICS - Wright State University
... Specifically for the strong nuclear force, Yukawa proposed that a previously unknown particle, now called a pion, is exchanged between nucleons, transmitting the force between them. Figure 33.3 illustrates how a pion would carry a force between a proton and a neutron. The pion has mass and can only ...
... Specifically for the strong nuclear force, Yukawa proposed that a previously unknown particle, now called a pion, is exchanged between nucleons, transmitting the force between them. Figure 33.3 illustrates how a pion would carry a force between a proton and a neutron. The pion has mass and can only ...
Phenomenology of Higgs Bosons Beyond the Standard Model
... Technology 1217. 59 pp. Uppsala: Uppsala universitet. ISBN 978-91-554-9138-3. After a long history of searches, a Higgs boson H was discovered by the ATLAS and the CMS experiments at the Large Hadron Collider (LHC) in 2012. Its properties t well the ones predicted by the Standard Model (SM) of part ...
... Technology 1217. 59 pp. Uppsala: Uppsala universitet. ISBN 978-91-554-9138-3. After a long history of searches, a Higgs boson H was discovered by the ATLAS and the CMS experiments at the Large Hadron Collider (LHC) in 2012. Its properties t well the ones predicted by the Standard Model (SM) of part ...
Femtoscopy with unlike-sign kaons at STAR in 200 GeV Au+Au
... Abstract. In the collisions of heavy ions the nuclear matter can undergo a phase transition from hadrons to a state of deconfined quarks and gluons called the Quak-Gluon Plasma. Femtoscopic measurements of two-particle correlations at small relative momenta reveal information about the space-time cha ...
... Abstract. In the collisions of heavy ions the nuclear matter can undergo a phase transition from hadrons to a state of deconfined quarks and gluons called the Quak-Gluon Plasma. Femtoscopic measurements of two-particle correlations at small relative momenta reveal information about the space-time cha ...
The Schwarzschild Proton - Hawaii Institute for Unified Physics
... size and mass of a system collapsing during black hole formation. Bahcall and Frautschi utilized the strong force interaction time of 10-23 seconds and established a minimum “hadron barrier” limit to black hole size of 10-13cm with a mass of 1015gm. Falla and Landsburg derived an alternative approac ...
... size and mass of a system collapsing during black hole formation. Bahcall and Frautschi utilized the strong force interaction time of 10-23 seconds and established a minimum “hadron barrier” limit to black hole size of 10-13cm with a mass of 1015gm. Falla and Landsburg derived an alternative approac ...
Option J: Particle physics
... EXAMPLE: A proton and an antiproton are created from the void as allowed by the HUP. How much time do they exist before annihilating each other? SOLUTION: A proton has a mass of 1.6710-27 kg. From E = mc2 we can calculate the energy of a proton (or an antiproton) to be ∆E = (1.6710-27)(3.00108)2 ...
... EXAMPLE: A proton and an antiproton are created from the void as allowed by the HUP. How much time do they exist before annihilating each other? SOLUTION: A proton has a mass of 1.6710-27 kg. From E = mc2 we can calculate the energy of a proton (or an antiproton) to be ∆E = (1.6710-27)(3.00108)2 ...
Maxim`s talk
... Of the many possibilities for combining quarks with colour into colourless hadrons, only two configurations were found, till now… ...
... Of the many possibilities for combining quarks with colour into colourless hadrons, only two configurations were found, till now… ...
The Search for Matter--Anti-Matter Asymmetries in the
... designed to produce 30 10 6 bb pairs per year. [3.6 x 10 6 produced by PEP-II in the month of October, 2000] The BABAR experiment at SLAC is able to detect B-meson decays with good efficiency and good resolution. BABAR’’s detectors are rapidly approaching design specifications. BABAR is on sched ...
... designed to produce 30 10 6 bb pairs per year. [3.6 x 10 6 produced by PEP-II in the month of October, 2000] The BABAR experiment at SLAC is able to detect B-meson decays with good efficiency and good resolution. BABAR’’s detectors are rapidly approaching design specifications. BABAR is on sched ...
LHC Theory Lecture 1: Calculation of Scattering Cross Sections
... Proton-proton collider: bunches of protons are brought to collision at a center of mass (cms) energy of several TeV /c 2 (Tera ≡ T = 1012 ). About 115 billion particles per bunch of ∼ 7cm length and the diameter of a hair! As protons are very small objects (6 o of about 1fm=10−15 m), nearly all part ...
... Proton-proton collider: bunches of protons are brought to collision at a center of mass (cms) energy of several TeV /c 2 (Tera ≡ T = 1012 ). About 115 billion particles per bunch of ∼ 7cm length and the diameter of a hair! As protons are very small objects (6 o of about 1fm=10−15 m), nearly all part ...
Barish Communications 07-06
... How can we solve the mystery of dark energy? Are there extra dimensions of space? Do all the forces become one? Why are there so many kinds of particles? What is dark matter? How can we make it in the laboratory? ...
... How can we solve the mystery of dark energy? Are there extra dimensions of space? Do all the forces become one? Why are there so many kinds of particles? What is dark matter? How can we make it in the laboratory? ...
t - H1
... Glauber wrote his formula for heavy nuclei and for deuteron. He was the first who realized that his formula in the case of deuteron describes both the elastic cross section and the diffractive dissociation of the deuteron. Genya Levin ...
... Glauber wrote his formula for heavy nuclei and for deuteron. He was the first who realized that his formula in the case of deuteron describes both the elastic cross section and the diffractive dissociation of the deuteron. Genya Levin ...
High angle neutron-proton scattering
... quark u with charge +2/3 and inversely the proton (uud) quark u mutates into a quark d. The explanation of the synchronization of these mutations is not straightforward at all since it implies the mutation of charges into different fractional values and also the sign inversion of their electric cha ...
... quark u with charge +2/3 and inversely the proton (uud) quark u mutates into a quark d. The explanation of the synchronization of these mutations is not straightforward at all since it implies the mutation of charges into different fractional values and also the sign inversion of their electric cha ...
Our bodies are made of neutrons, protons and electrons
... electron, which have integer charges of +1 and -1 respectively. Quarks also carry another type of charge called color charge, which we will discuss later. The most elusive quark, the top quark, was discovered in 1995 after its existence had been theorized for 20 years. In addition, there are gluons, ...
... electron, which have integer charges of +1 and -1 respectively. Quarks also carry another type of charge called color charge, which we will discuss later. The most elusive quark, the top quark, was discovered in 1995 after its existence had been theorized for 20 years. In addition, there are gluons, ...
A search for the Higgs boson in the decay to b-quarks
... If a particle travels with the speed of light, left or right handedness is independent of its reference frame (in Formula 1.1, the sign of helicity depends on the direction of p). Only mass-less particles travel with the speed of light, but we neglect the mass of the neutrinos in this section. It gi ...
... If a particle travels with the speed of light, left or right handedness is independent of its reference frame (in Formula 1.1, the sign of helicity depends on the direction of p). Only mass-less particles travel with the speed of light, but we neglect the mass of the neutrinos in this section. It gi ...
Large Hadron Collider
The Large Hadron Collider (LHC) is the world's largest and most powerful particle collider, the largest, most complex experimental facility ever built, and the largest single machine in the world. It was built by the European Organization for Nuclear Research (CERN) between 1998 and 2008 in collaboration with over 10,000 scientists and engineers from over 100 countries, as well as hundreds of universities and laboratories. It lies in a tunnel 27 kilometres (17 mi) in circumference, as deep as 175 metres (574 ft) beneath the France–Switzerland border near Geneva, Switzerland. Its first research run took place from 30 March 2010 to 13 February 2013 at an initial energy of 3.5 teraelectronvolts (TeV) per beam (7 TeV total), almost 4 times more than the previous world record for a collider, rising to 4 TeV per beam (8 TeV total) from 2012. On 13 February 2013 the LHC's first run officially ended, and it was shut down for planned upgrades. 'Test' collisions restarted in the upgraded collider on 5 April 2015, reaching 6.5 TeV per beam on 20 May 2015 (13 TeV total, the current world record for particle collisions). Its second research run commenced on schedule, on 3 June 2015.The LHC's aim is to allow physicists to test the predictions of different theories of particle physics, high-energy physics and in particular, to prove or disprove the existence of the theorized Higgs boson and the large family of new particles predicted by supersymmetric theories, and other unsolved questions of physics, advancing human understanding of physical laws. It contains seven detectors, each designed for certain kinds of research. The proton-proton collision is the primary operation method, but the LHC has also collided protons with lead nuclei for two months in 2013 and used lead–lead collisions for about one month each in 2010, 2011, and 2013 for other investigations. The LHC's computing grid was (and currently is) a world record holder. Data from collisions was anticipated to be produced at an unprecedented rate for the time, of tens of petabytes per year, a major challenge at the time, to be analysed by a grid-based computer network infrastructure connecting 140 computing centers in 35 countries – by 2012 the Worldwide LHC Computing Grid was also the world's largest distributed computing grid, comprising over 170 computing facilities in a worldwide network across 36 countries.