Particle Physics 2011
... 2011 was a crucial year in the preparation of the OLYMPUS experiment at DORIS III, whose goal is to precisely measure electron– and positron–proton scattering at low energies in order to resolve an experimental puzzle in the elastic form factors of the proton. Accelerator and detector were successfu ...
... 2011 was a crucial year in the preparation of the OLYMPUS experiment at DORIS III, whose goal is to precisely measure electron– and positron–proton scattering at low energies in order to resolve an experimental puzzle in the elastic form factors of the proton. Accelerator and detector were successfu ...
Introduction to Lattice Field Theory
... Example 2: the Ising model Example 3: scalar field theory Bosons on the lattice References Lattice formulation of gauge theories Wilson’s formulation of lattice gauge theory Confinement in strong coupling Gauge theories at high temperature Monte Carlo Simulations The continuum limit Lattice Fermions ...
... Example 2: the Ising model Example 3: scalar field theory Bosons on the lattice References Lattice formulation of gauge theories Wilson’s formulation of lattice gauge theory Confinement in strong coupling Gauge theories at high temperature Monte Carlo Simulations The continuum limit Lattice Fermions ...
Reconstruction of ttZ Events Using Kinematic Likelihood Fits at the
... precise measurements of the cross section of ttZ processes. Although these processes were recently discovered by the cms collaboration [11], measurements of the cross section have not been accurate enough to allow a determination of the isospin component. The studies presented within this thesis wil ...
... precise measurements of the cross section of ttZ processes. Although these processes were recently discovered by the cms collaboration [11], measurements of the cross section have not been accurate enough to allow a determination of the isospin component. The studies presented within this thesis wil ...
Z` Mediation of Supersymmetry Breaking
... a solution to the problem of the meson, and that experimental results will confirm so many detailed features of the theory that it will be clear to everybody that it is the correct one. Such things have happened in the past. They may happen again. However, I do not believe that we can count on it, a ...
... a solution to the problem of the meson, and that experimental results will confirm so many detailed features of the theory that it will be clear to everybody that it is the correct one. Such things have happened in the past. They may happen again. However, I do not believe that we can count on it, a ...
Ecole Doctorale de Physique et de Chimie Physique
... be interpreted as the effective theory of a more fundamental one. Unfortunately, the 7 and 8 TeV runs of the LHC did not provide any sign of new physics yet but there has been at least one major discovery in 2010, namely the discovery of a scalar particle with a mass of 125 GeV and which properties ...
... be interpreted as the effective theory of a more fundamental one. Unfortunately, the 7 and 8 TeV runs of the LHC did not provide any sign of new physics yet but there has been at least one major discovery in 2010, namely the discovery of a scalar particle with a mass of 125 GeV and which properties ...
15. GRAND UNIFIED THEORIES 15. Grand Unified Theories 15.1. Grand Unification 1
... These theories can retain many of the nice features of four dimensional SUSY GUTs, such as charge quantization, gauge coupling unification and sometimes even Yukawa unification; while at the same time resolving some of the difficulties of 4d GUTs, in particular problems with unwieldy Higgs sectors neces ...
... These theories can retain many of the nice features of four dimensional SUSY GUTs, such as charge quantization, gauge coupling unification and sometimes even Yukawa unification; while at the same time resolving some of the difficulties of 4d GUTs, in particular problems with unwieldy Higgs sectors neces ...
DISCRETE 2016: Fifth Symposium on Prospects in the Physics of
... the standard seesaw model what is the minimum value the mass of a right-handed (RH) neutrino must have for allowing successful leptogenesis via CP-violating decays? I show that, for low RH neutrino masses and thanks to thermal effects, leptogenesis turns out to proceed efficiently from the decay of ...
... the standard seesaw model what is the minimum value the mass of a right-handed (RH) neutrino must have for allowing successful leptogenesis via CP-violating decays? I show that, for low RH neutrino masses and thanks to thermal effects, leptogenesis turns out to proceed efficiently from the decay of ...
Beyond the Standard Model
... physics beyond the Standard Model. Although such ideas often have a finite life-time, there are many that have been around for a decade or more, and are likely to play an important rôle in particle physics at least for another decade. The emphasis is on those ideas that are likely to survive for a ...
... physics beyond the Standard Model. Although such ideas often have a finite life-time, there are many that have been around for a decade or more, and are likely to play an important rôle in particle physics at least for another decade. The emphasis is on those ideas that are likely to survive for a ...
Lecture 1
... Where and how do we generate the Baryon asymmetry? • No definitive answer to this question yet! • In 1967 A. Sacharov formulated a set of general conditions that any such mechanism has to meet 1) You need a process that violates the baryon number B: (Baryon number of matter=1, of anti-matter = -1) ...
... Where and how do we generate the Baryon asymmetry? • No definitive answer to this question yet! • In 1967 A. Sacharov formulated a set of general conditions that any such mechanism has to meet 1) You need a process that violates the baryon number B: (Baryon number of matter=1, of anti-matter = -1) ...
Pion as a Nambu-Goldstone boson
... Breaking of a continuous global symmetry leads to Nambu-Goldstone Bosons. No information about how the breaking occurs is needed. Natural explanation for smallness of Pion mass. Found a technique to relate infinitly many diagramms. From the assumption that Pions and even Kaons and the Eta are Goldst ...
... Breaking of a continuous global symmetry leads to Nambu-Goldstone Bosons. No information about how the breaking occurs is needed. Natural explanation for smallness of Pion mass. Found a technique to relate infinitly many diagramms. From the assumption that Pions and even Kaons and the Eta are Goldst ...
Grand Unified Models and Cosmology
... Also, which process(es) lead to the baryon asymmetry of the universe? Which process(es) can predict the small ratio η? What is the nature of the dark-matter of the universe? How can the CBR look the same in all directions [16] when it comes from causally disconnected regions of space? This is referr ...
... Also, which process(es) lead to the baryon asymmetry of the universe? Which process(es) can predict the small ratio η? What is the nature of the dark-matter of the universe? How can the CBR look the same in all directions [16] when it comes from causally disconnected regions of space? This is referr ...
What is new at CERN? - Vanderbilt HEP
... Beam Loss Induced Vacuum degradation in LEAR, and the creation of other charge states by Pb+54 interacting with the beam gas, led to a vacuum spec in LEAR of 1e-12 mbar (LHC can be 1e-9mbar). Gabella CMS Status ...
... Beam Loss Induced Vacuum degradation in LEAR, and the creation of other charge states by Pb+54 interacting with the beam gas, led to a vacuum spec in LEAR of 1e-12 mbar (LHC can be 1e-9mbar). Gabella CMS Status ...
Blondel-precision-measts-18-07-2013
... Unbeatable precision on EW quantities (mZ , Z, mW , ALR , Rb etc, etc…..) speak for ...
... Unbeatable precision on EW quantities (mZ , Z, mW , ALR , Rb etc, etc…..) speak for ...
LHC sensitivity to almost all SM Higgs masses 2011-12
... PDFs are determined in Deep Inelastic ScatteringSTRONG Oxford involvement in HERAPDFBut can be used to predict cross sections for the LHC. Early LHC data, using 36pb-1, are well predicted using ...
... PDFs are determined in Deep Inelastic ScatteringSTRONG Oxford involvement in HERAPDFBut can be used to predict cross sections for the LHC. Early LHC data, using 36pb-1, are well predicted using ...
Searches for NP : non-SUSY scenarios
... • Tevatron probes large masses for large (LQ eq) independently of • HERA better probes LQs with small provided that not too small Complementarity of both facilities NB : at HERA, e+ / e- + polarisation could help in disentangling the LQ quantum nbs ...
... • Tevatron probes large masses for large (LQ eq) independently of • HERA better probes LQs with small provided that not too small Complementarity of both facilities NB : at HERA, e+ / e- + polarisation could help in disentangling the LQ quantum nbs ...
From Sets to Quarks
... that the virtual sea within the proton is at the lowest energy level that is experimentally observable. The virtual sea gluons are massless SU(3) gauge bosons. Since the lightest quarks are up and down quarks, the virtual sea quark-antiquark pairs that most often appear from the vacuum are up or dow ...
... that the virtual sea within the proton is at the lowest energy level that is experimentally observable. The virtual sea gluons are massless SU(3) gauge bosons. Since the lightest quarks are up and down quarks, the virtual sea quark-antiquark pairs that most often appear from the vacuum are up or dow ...
Introduction to Spontaneous Symmetry Breaking
... ξ disappears. In fact ξ becomes the longitudinal component of B µ . massless gauge boson + Goldstone boson=massive vector meson all long range forces disappear. This was discovered in the 60 0 s by Higgs, Englert & Brout, Guralnik, Hagen & Kibble independently and is usually called Higgs phenomena T ...
... ξ disappears. In fact ξ becomes the longitudinal component of B µ . massless gauge boson + Goldstone boson=massive vector meson all long range forces disappear. This was discovered in the 60 0 s by Higgs, Englert & Brout, Guralnik, Hagen & Kibble independently and is usually called Higgs phenomena T ...
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 ...
CMS
... doesn’t look at: for example low pT end of the DY spectrum, quiet detector, etc Most of our topics are prime start-up topics For example J. Hollar is now leading the iCSA08 dimuon analysis In the next years the only area in CMS where additional detector construction may happen (FP420) Finally, alrea ...
... doesn’t look at: for example low pT end of the DY spectrum, quiet detector, etc Most of our topics are prime start-up topics For example J. Hollar is now leading the iCSA08 dimuon analysis In the next years the only area in CMS where additional detector construction may happen (FP420) Finally, alrea ...
Desperately Seeking SUSY h (University of Cambridge) Please ask questions while I’m talking
... matter candidate, since it decays. One then has to have something else, eg: • Gravitino - still decays, but lifetime may be much longer than the age of the universe • Hidden sector matter • Axion/axino The implications of each of these is that (in-)direct dark matter searches shouldn’t find anything ...
... matter candidate, since it decays. One then has to have something else, eg: • Gravitino - still decays, but lifetime may be much longer than the age of the universe • Hidden sector matter • Axion/axino The implications of each of these is that (in-)direct dark matter searches shouldn’t find anything ...