High-Energy Gamma-Ray Production in Microquasars
... the decay of neutral pions produced in relativistic pp collisions. Assuming constant parameters for the system, our predictions are consistent with a peak of gamma-ray emission at the periastron passage, with a secondary maximum at phase ψ ∼ 4/3π when the accretion rate has also a local maximum i.e. ...
... the decay of neutral pions produced in relativistic pp collisions. Assuming constant parameters for the system, our predictions are consistent with a peak of gamma-ray emission at the periastron passage, with a secondary maximum at phase ψ ∼ 4/3π when the accretion rate has also a local maximum i.e. ...
12-Rykov_PolarizedBeam24A_ICPPA_2016_20161013
... • Neutral secondary beam toward either 24A or 24B line • MC: Magnets-Correctors for a better acceptance tunning October 13, 2016 ...
... • Neutral secondary beam toward either 24A or 24B line • MC: Magnets-Correctors for a better acceptance tunning October 13, 2016 ...
Higgs Update - Oxford Physics
... On the 4th of July 2012, ATLAS and CMS experiments announced the observation of a new narrow resonance at a mass of ~125-126 GeV. Studies of the properties of this particle are now in full force with the aim to establish if the particle is the long sought Higgs boson of the Higgs mechanism responsib ...
... On the 4th of July 2012, ATLAS and CMS experiments announced the observation of a new narrow resonance at a mass of ~125-126 GeV. Studies of the properties of this particle are now in full force with the aim to establish if the particle is the long sought Higgs boson of the Higgs mechanism responsib ...
6.5 Synchrotron radiation and damping
... Charged particles radiate when they are deflected in the magnetic field [1] (transverse acceleration). In the ultra-relativistic case, when the particle speed is very close to the speed of light, ≈ c, most of the radiation is emitted in the forward direction [2] into a cone centred on the tangent ...
... Charged particles radiate when they are deflected in the magnetic field [1] (transverse acceleration). In the ultra-relativistic case, when the particle speed is very close to the speed of light, ≈ c, most of the radiation is emitted in the forward direction [2] into a cone centred on the tangent ...
The Standard Model of Particle Physics
... and weak interactions, coupled with experimental discoveries and attempts to interpret available data, led to the formulation of the SM, which has been experimentally veri ed to a high degree of accuracy over a broad range of energy and processes. The SM is characterized in part by the spectrum of e ...
... and weak interactions, coupled with experimental discoveries and attempts to interpret available data, led to the formulation of the SM, which has been experimentally veri ed to a high degree of accuracy over a broad range of energy and processes. The SM is characterized in part by the spectrum of e ...
Standard Model at the LHC (Lecture 1: Theoretical Recap) M. Schott
... only colour singlet states can exist as free particles Important experimental consequence quarks/gluons cannot be directly detected, as they will ”hadronize”, i.e. ”transform” to a bunch of hadrons ...
... only colour singlet states can exist as free particles Important experimental consequence quarks/gluons cannot be directly detected, as they will ”hadronize”, i.e. ”transform” to a bunch of hadrons ...
Slides - grapes-3
... atoms of one element can combine with atoms of other element to make compounds, e.g. water is made of oxygen and hydrogen (OH) • 1896 M. & P. Curie find atoms decay • 1897 J. J. Thomson discovers electron • 1906 E. Rutherford: gold foil experiment ...
... atoms of one element can combine with atoms of other element to make compounds, e.g. water is made of oxygen and hydrogen (OH) • 1896 M. & P. Curie find atoms decay • 1897 J. J. Thomson discovers electron • 1906 E. Rutherford: gold foil experiment ...
Field Particles - X-ray and Observational Astronomy Group
... • In order to work, electroweak theory requires the existence of a particle called the Higgs Boson – The Higgs Boson is expected have a rest mass > 1TeV/c2 – Head-on collisions between protons at energies ~20TeV are required to produce a Higgs Boson (if they exist) – Such energies will only be achie ...
... • In order to work, electroweak theory requires the existence of a particle called the Higgs Boson – The Higgs Boson is expected have a rest mass > 1TeV/c2 – Head-on collisions between protons at energies ~20TeV are required to produce a Higgs Boson (if they exist) – Such energies will only be achie ...
Professor Liss
... SUSY includes a partner to the top quark, the ‘stop quark’ or ‘top squark’ that nearly cancels the top quark loop ...
... SUSY includes a partner to the top quark, the ‘stop quark’ or ‘top squark’ that nearly cancels the top quark loop ...
Slide 1
... strong force – Exist only in triplets (baryons) or paired with an antiquark (mesons) – No free quarks ...
... strong force – Exist only in triplets (baryons) or paired with an antiquark (mesons) – No free quarks ...
![[a,b]! - Nikhef](http://s1.studyres.com/store/data/000147861_1-4659b0cc203c9fe99ee5f554409aa79c-300x300.png)
[a,b]! - Nikhef
... How do you avoid that all particles tumble into the negative energy levels? Simple: assume that all negative energy levels are filled (possible thanks to Pauli exclusion principle!) ...
... How do you avoid that all particles tumble into the negative energy levels? Simple: assume that all negative energy levels are filled (possible thanks to Pauli exclusion principle!) ...
briancox
... • @ 2 x 1033 cm-2s-1, 7 interactions / bunch crossing • -> 30% of FP420 events have an additional track • Matching mass and rapidity of central system removes large fraction of these • Of the remaining, 97.4% rejected by fast timing detectors with 10ps timing resolution (2.1 mm) • Preliminary studie ...
... • @ 2 x 1033 cm-2s-1, 7 interactions / bunch crossing • -> 30% of FP420 events have an additional track • Matching mass and rapidity of central system removes large fraction of these • Of the remaining, 97.4% rejected by fast timing detectors with 10ps timing resolution (2.1 mm) • Preliminary studie ...
Neutrons Hologram
... In a data set consisting of 7- and 8-TeV collisions, 15 candidate events for this process were observed. While it may not seem like much, the expected background was considerably smaller, allowing the CMS team to claim that they have evidence of the process. (In the particle physics world, evidence ...
... In a data set consisting of 7- and 8-TeV collisions, 15 candidate events for this process were observed. While it may not seem like much, the expected background was considerably smaller, allowing the CMS team to claim that they have evidence of the process. (In the particle physics world, evidence ...
Probing Gluon Helicity with Dijets from $\ sqrt s $= 510 GeV
... Simulated pp collisions are used to correct the reconstructed Minv for detector inefficiency and resolution effects. Monte Carlo (MC) events are generated with PYTHIA 6.426 [10] using the Perugia 0 tune [11], and are passed through detector simulations created in GEANT [12]. The shift in Minv is cal ...
... Simulated pp collisions are used to correct the reconstructed Minv for detector inefficiency and resolution effects. Monte Carlo (MC) events are generated with PYTHIA 6.426 [10] using the Perugia 0 tune [11], and are passed through detector simulations created in GEANT [12]. The shift in Minv is cal ...
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.