Top Quark Physics at the Large Hadron Collider
... What does the detector do? • The detector tries to measure the 4-momenta of all particles in a pp collision • 3-momenta of charged particles are inferred by reconstructing tracks as they bend in a 4T magnetic field • For neutrals (γ, neutrons), energy is measured by size of "shower" in instrumented ...
... What does the detector do? • The detector tries to measure the 4-momenta of all particles in a pp collision • 3-momenta of charged particles are inferred by reconstructing tracks as they bend in a 4T magnetic field • For neutrals (γ, neutrons), energy is measured by size of "shower" in instrumented ...
Particle Physics Matter, Energy, Space, Time
... We can eliminate many possibilities at LHC But new interpretations necessarily emerge Race will be on: – theorists coming up with new interpretations – experimentalists excluding new interpretations ...
... We can eliminate many possibilities at LHC But new interpretations necessarily emerge Race will be on: – theorists coming up with new interpretations – experimentalists excluding new interpretations ...
Belle II Detector: status and proposed US contributions
... relatively easy to extract/insert these without dismantling iron supports plastic in layer 0,1 will better shield outer barrel layers from neutrons ...
... relatively easy to extract/insert these without dismantling iron supports plastic in layer 0,1 will better shield outer barrel layers from neutrons ...
Extra Dimensions, no kidding
... the forces mediators, have a tower of excitations of mass d/R where d is the number and R is the size of the extra dimensions. The interactions of the excitations with quarks, leptons and gauge bosons, is fixed by the theory. So in this case not only gravitons but also the mediators of the other for ...
... the forces mediators, have a tower of excitations of mass d/R where d is the number and R is the size of the extra dimensions. The interactions of the excitations with quarks, leptons and gauge bosons, is fixed by the theory. So in this case not only gravitons but also the mediators of the other for ...
OscSNS: Precision Neutrino Measurements at
... The flagship cross section analyses of OscSNS are the elastic scattering νee-→ νee- (NC and CC), NC νµe-→ νµe-, NC anti-νµe-→ antiνµe-, NC νµC→ νµC, and the CC νe12C→e-12N interactions. The current world's best measurement of the νee-→ νee- interaction arises in a sample of only 191 events [6], and ...
... The flagship cross section analyses of OscSNS are the elastic scattering νee-→ νee- (NC and CC), NC νµe-→ νµe-, NC anti-νµe-→ antiνµe-, NC νµC→ νµC, and the CC νe12C→e-12N interactions. The current world's best measurement of the νee-→ νee- interaction arises in a sample of only 191 events [6], and ...
the compass rich-1 read-out system
... was possible to take only a small part of the data in the integrated mode. Fig. 7 shows the data obtained using the small sample of data with tracking information: the cluster distribution for a single event in the RICH and cumulated events showing the proton and the pion rings. Kaons lie in between ...
... was possible to take only a small part of the data in the integrated mode. Fig. 7 shows the data obtained using the small sample of data with tracking information: the cluster distribution for a single event in the RICH and cumulated events showing the proton and the pion rings. Kaons lie in between ...
GEANT4 Modelling of Heat Deposition into the
... both by thermal radiation and conduction to the mounting copper block. For a multiple slab target design and a larger proton beam there would be differences between slabs regarding energy deposition: transmitted protons scattered from the electrons in the first slab causes a larger beam spot in the ...
... both by thermal radiation and conduction to the mounting copper block. For a multiple slab target design and a larger proton beam there would be differences between slabs regarding energy deposition: transmitted protons scattered from the electrons in the first slab causes a larger beam spot in the ...
Notes/All Physics IB/Fundimental Particles
... The Large Hadron Collider (LHC) at CERN is the latest effort to probe deeper into nature. The LHC smashes protons together at the unprecedented energy levels of 14 TeV (1 TeV is the amount of energy an electron gains when accelerated through a potential difference of 1 000 000 000 000 V). Our curren ...
... The Large Hadron Collider (LHC) at CERN is the latest effort to probe deeper into nature. The LHC smashes protons together at the unprecedented energy levels of 14 TeV (1 TeV is the amount of energy an electron gains when accelerated through a potential difference of 1 000 000 000 000 V). Our curren ...
Electroweak precision data and right-handed gauge bosons
... a few tenth of percent to perhaps a few percent deviations from the standard model. Therefore, cleary discovery of some new physics is unlikely to come simply from improved precision in a single experimental measurement. Instead, one will check various scenarios by global fits to all data. Also, sho ...
... a few tenth of percent to perhaps a few percent deviations from the standard model. Therefore, cleary discovery of some new physics is unlikely to come simply from improved precision in a single experimental measurement. Instead, one will check various scenarios by global fits to all data. Also, sho ...
Quark Gluon Plasma: the Hottest Matter on Earth
... • The further quarks apart, the stronger the force; the closer the quarks, the weaker the interaction • What will happen if we increase the energy “high enough”? ...
... • The further quarks apart, the stronger the force; the closer the quarks, the weaker the interaction • What will happen if we increase the energy “high enough”? ...
L3_interactions_matter_riegler09 - Indico
... If the distance between interactions is exponentially distributed with an mean free path of λ the number of interactions on a distance D is Poisson distributed with an average of n=D/λ. How do we find the energy loss distribution ? If f(E) is the probability to lose the energy E’ in an interaction, ...
... If the distance between interactions is exponentially distributed with an mean free path of λ the number of interactions on a distance D is Poisson distributed with an average of n=D/λ. How do we find the energy loss distribution ? If f(E) is the probability to lose the energy E’ in an interaction, ...
Saturation Physics Yuri Kovchegov The Ohio State University
... eRHIC is almost certainly going to probe deep into the saturation region. EM probes would be more convincing: no fragmentation effects there. ...
... eRHIC is almost certainly going to probe deep into the saturation region. EM probes would be more convincing: no fragmentation effects there. ...
Symmetry Principles and Conservation Laws in Atomic and
... Newton's third law introduces a simple illustration of the relation between a symmetry and a conservation law. In the remainder of the article we will explore similar relationships that impact much of the frontiers of physics, which are being investigated today; these studies use powerful theoretica ...
... Newton's third law introduces a simple illustration of the relation between a symmetry and a conservation law. In the remainder of the article we will explore similar relationships that impact much of the frontiers of physics, which are being investigated today; these studies use powerful theoretica ...
fluka-models
... process, but by group-to-group transfer probabilities (downscattering matrix) The scattering transfer probability between different groups represented by a Legendre polynomial expansion truncated at the (N+1)th term: ...
... process, but by group-to-group transfer probabilities (downscattering matrix) The scattering transfer probability between different groups represented by a Legendre polynomial expansion truncated at the (N+1)th term: ...
Turner-LHCf - Aspen Workshop on Cosmic Ray Physics
... • Use 7+7 TeV pp collisions to benchmark neutral particle production cross sections at 1017eV laboratory equivalent energy – Useful for cosmic ray simulations, contribute to resolution of super GZK and composition questions • Previous experiment UA7 performed at SPPS 400 + 400 GeV, 1014 eV (E. Pare ...
... • Use 7+7 TeV pp collisions to benchmark neutral particle production cross sections at 1017eV laboratory equivalent energy – Useful for cosmic ray simulations, contribute to resolution of super GZK and composition questions • Previous experiment UA7 performed at SPPS 400 + 400 GeV, 1014 eV (E. Pare ...
Wake field
... Particle accelerators are continuously being pushed to new parameter regimes with higher currents, higher power and higher intensity ...
... Particle accelerators are continuously being pushed to new parameter regimes with higher currents, higher power and higher intensity ...
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.