QCD and strongly coupled gauge theories: challenges and
... particle or nuclear physicists working in fields other than
QCD and the Standard Model (SM), to students starting
research in QCD or elsewhere. We should note that the scope
of QCD is so vast that it is impossible to cover absolutely
everything. Any omissions stem from the need to create
something u ...
institut de física corpuscular - Instituto de Física Corpuscular
... Physics and the first studying particle and nuclear physics.
The mission of IFIC covers a wide range of subjects. In a broad sense, we study the fundamental
interactions (gravitational, electroweak and strong) and the building blocks of matter, considering both
the theoretical and experimental aspec ...
SCIENTIFIC ACHIEVEMENTS OF VLADIMIR GRIBOV LN Lipatov
... idea but the main results were going to be presented in the next paper (see Ref.
Eur. Phys. J. C10, 91 (1999)). Now it seems to be diﬃcult to convince the
scientiﬁc community in the validity of Gribov’s idea. Some time will pass before
26 Non-WIMP dark matter
... where Ωi denotes the present-day energy-density fraction of the i-th component of the universe. The primary
motivation of the Asymmetric DM (ADM) scenario is to offer a dynamical explanation for this cosmic
coincidence of visible and dark matter. In fact, there are more hints pointing towards a conn ...
Coupling measurement of the Higgs boson and search for heavy
... The Higgs boson was the last missing particle of the Standard Model of particle physics
for a long time. In July 2012, both the ATLAS  and CMS  collaboration reported
about the observation of a new resonance at roughly 125 GeV with a statistical significance of five standard deviations. Since ...
PDF of this page - Miami bulletin
... quantum mechanics, and electromagnetism. Develops problemsolving skills by applying material from introductory math and physics
classes along with new mathematical techniques. Allows for modeling
of systems at a deeper level. Emphasizes the use of mathematics to
model physical systems and methods of ...
The Minimal Length Scale
... A NUCLEAR accelerator designed to replicate the Big Bang is
under investigation by international physicists because of fears that
it might cause ’perturbations of the universe’ that could destroy the
Earth. One theory even suggests that it could create a black hole.
Reconstruction of ttZ Events Using Kinematic Likelihood Fits at the
... der investigation and some of its properties have not been measured yet. One of these
properties, the top quark’s weak isospin, remains undetermined despite its paramount
importance for validating the Standard-Model likeness of the top quark. A precise measurement of the weak isospin will be a key a ...
The Oscillating Neutrino
... that neutrinos might oscillate, or periodically
present themselves as one of several different types.
Particle Physics 2011
... The year 2011 marks a record year for the Large Hadron
Collider (LHC) at CERN in Geneva. The accelerator crew
increased the luminosity beyond even the most optimistic
expectations, by a factor of approximately 100 compared to
2010. The collected luminosity provides the basis for a
multitude of very ...
... symmetry breaking — the one Higgs double model — is at least approximately
correct. What does that have to do with neutrinos?
The tiny neutrino masses point to three different possibilities.
1. Neutrinos talk to the Higgs boson very, very weakly;
2. Neutrinos talk to a different Higgs boson – there ...
The landscape of intersecting brane models
... generations of matter fields reasonably equally distributed. Our results so far have also
not confirmed the interesting claim of  that 3 generations (compared to 1, 2 or 4) is
disfavored in this ensemble, but it may be that we did not get far enough to see this and
that it might come out of a mo ...
Double-Soft Limits of Gluons and Gravitons
... Kac-Moody type symmetry were made recently . In this picture the scattering amplitudes in
four-dimensional quantum field theory are related to correlation functions of a two-dimensional
quantum theory living on the sphere at null infinity. This fascinating proposal merits further
The suble ...
JHEP07(2007)083 - IHEP Diffractive Group
... leading Regge trajectories in the Euclidean domain at least at −2 GeV 2 < t < 0. The first
phenomenological argument is a natural desire to continue Chew-Frautschi plots to the
region of negative values of the argument. But all poles corresponding to resonances are
situated on different unphysical s ...
ThesisBertVercnocke Cover - Departement Natuurkunde en
... they become first-order instead of the second-order equations one would expect.
Recently, it was found that this is a feature some non-supersymmetric black
hole solutions exhibit as well. We investigate if this holds more generally, by
examining what the conditions are to have first-order equations ...
The Confinement Problem in Lattice Gauge Theory
... lattices, generated by the lattice Monte Carlo technique. This is an important development,
since it means that the underlying mechanism of quark confinement, via definite classes of
field configurations, is open to numerical investigation.
Careful lattice simulations have also confirmed, in recent ...
¯ t Analysis with Taus in the Final State
... symbols NNLO QCD calculations. . . . . . . . . . . . . . . . . . . . . . . . . . .
The spontaneous symmetry breaking potential . . . . . . . . . . . . . . . . . . .
Top production processes at lowest order: gluon-gluon scattering diagrams (a)
and (b), and quark-quark scattering diagram (c). . . . . ...
A CP - Indico
... Time reversal symmetry (invariance under change of time direction) does certainly not correspond to our daily experience. The
macroscopic violation of T symmetry follows from maximising thermodynamic entropy (leaving a parking spot has a larger solution space
than entering it). In the microscopic wo ...
university of illinois at urbana-champaign
... Leader, Institute for Genomic Biology. Biophysics, Condensed Matter Physics, Statistical & Thermal Physics. Theoretical physics and complexity; pattern formation; statistical
physics; microbiology and evolutionary biology; fluid mechanics; materials theory; quantitative finance.
Gollin, George D., P ...
... The nature of dark matter remains a
standing problem in cosmology and
It’s relic abundance can be used to
determine the scale of its interactions.
Symmetry in Nature
... Symmetry in Nature
Symmetry surrounds you. Look down at your body. Look at the shapes on the screen. Look at
the buildings on your street. Look at your cat or dog.Symmetryis variously defined as
"proportion," "perfect, or harmonious proportions," and "a structure that allows an object to be
LHC the guide
... Standard Model of particles and forces (see page 6) summarizes
our present knowledge of particle physics. The Standard Model has
been tested by various experiments and it has proven particularly
successful in anticipating the existence of previously undiscovered
particles. However, it leaves many un ...
Data driven WZ background estimation for SUSY searches with
... Pseudo Feynman diagrams depicting the production diagrams of interest to SUSY searches using the three lepton + MET final state.
In diagram (a), the decay of the initial electroweakino pair is mediated by sleptons which can be real or virtual depending on the mass
hierarchy of the SUSY model under c ...
Introduction to String Theory
... 1.1.1 Our Model of Elementary Particles and Interactions . . 3
1.1.2 Theoretical questions raised by this description . . . . 5
1.1.3 Some proposals for physics beyond the Standard Model 7
1.1.4 String theory as a theory beyond the Standard Model . 13
2 Overview of string theory in perturbation theo ...
Supersymmetry (SUSY), a theory of particle physics, is a proposed type of spacetime symmetry that relates two basic classes of elementary particles: bosons, which have an integer-valued spin, and fermions, which have a half-integer spin. Each particle from one group is associated with a particle from the other, known as its superpartner, the spin of which differs by a half-integer. In a theory with perfectly ""unbroken"" supersymmetry, each pair of superpartners would share the same mass and internal quantum numbers besides spin. For example, there would be a ""selectron"" (superpartner electron), a bosonic version of the electron with the same mass as the electron, that would be easy to find in a laboratory. Thus, since no superpartners have been observed, if supersymmetry exists it must be a spontaneously broken symmetry so that superpartners may differ in mass. Spontaneously-broken supersymmetry could solve many mysterious problems in particle physics including the hierarchy problem. The simplest realization of spontaneously-broken supersymmetry, the so-called Minimal Supersymmetric Standard Model, is one of the best studied candidates for physics beyond the Standard Model.There is only indirect evidence and motivation for the existence of supersymmetry. Direct confirmation would entail production of superpartners in collider experiments, such as the Large Hadron Collider (LHC). The first run of the LHC found no evidence for supersymmetry (all results were consistent with the Standard Model), and thus set limits on superpartner masses in supersymmetric theories. Whilst many remain enthusiastic about supersymmetry, this first run at the LHC led some physicists to explore other ideas. In any case, in 2015 the LHC resumed its search for supersymmetry and other new physics in its second run.