Pre-class 11
... E = 2 · 511 keV. Once they come close enough to each other, they will annihilate one other and convert into two photons. Conservation momentum: . photons? 1 = -p2 What can of you tell about pthose two Conservation of energy: E1+E2 = 2mc2 , E1 = E2 = 511 keV ...
... E = 2 · 511 keV. Once they come close enough to each other, they will annihilate one other and convert into two photons. Conservation momentum: . photons? 1 = -p2 What can of you tell about pthose two Conservation of energy: E1+E2 = 2mc2 , E1 = E2 = 511 keV ...
Beyond the Standard Model at the LHC and Beyond
... … cosmic ray showers were found to contain many different types of particles … ...
... … cosmic ray showers were found to contain many different types of particles … ...
Leggi in PDF - SIF Prima Pagina
... our group he has established a very high level of "scientific fidelity". The present status of experimental Physics corresponds to a large number of people working together; the number being of the order of three powers of ten. The "scientific fidelity" is needed more than ever. In the middle of th ...
... our group he has established a very high level of "scientific fidelity". The present status of experimental Physics corresponds to a large number of people working together; the number being of the order of three powers of ten. The "scientific fidelity" is needed more than ever. In the middle of th ...
Presentazione di PowerPoint
... In the Standard Model the weak and the electromagnetic interactions have been combined into a unified electroweak theory. At very short distances (10-18 m) the strength of the weak interaction is comparable to that of the electromagnetic. On the other hand, at thirty times that distance (3x10-17 m) ...
... In the Standard Model the weak and the electromagnetic interactions have been combined into a unified electroweak theory. At very short distances (10-18 m) the strength of the weak interaction is comparable to that of the electromagnetic. On the other hand, at thirty times that distance (3x10-17 m) ...
ATLAS experiment at the CERN Large Hadron Collider
... Building blocks of the universe Why do experiments at the LHC ? LHC, ATLAS and collaboration Searching for a new particle Recent LHC news ...
... Building blocks of the universe Why do experiments at the LHC ? LHC, ATLAS and collaboration Searching for a new particle Recent LHC news ...
13. Particle physics
... baryons (proton), which are fermions. Leptons are affected by the weak force Look for instance at the annihilation process proton/anti-proton. p + anti-p Æ 4π- + 4π + This is a strong decay (produced by the strong force), since all particles involved are hadrons. When a pion (ππ) decays, with a mean ...
... baryons (proton), which are fermions. Leptons are affected by the weak force Look for instance at the annihilation process proton/anti-proton. p + anti-p Æ 4π- + 4π + This is a strong decay (produced by the strong force), since all particles involved are hadrons. When a pion (ππ) decays, with a mean ...
Symmetry and Its Violation -unifying concept of universe
... quarks and electromagnetic Quantum leptons (photon: g) Field ...
... quarks and electromagnetic Quantum leptons (photon: g) Field ...
Standard Model
... bosons) are the elementary particles that mediate the weak interaction; their symbols are W+, W−, and Z. These bosons are among the heavyweights of the elementary particles. With masses of 80.4 GeV/c2 and 91.2 GeV/c2, respectively, the W and Z bosons are almost 100 times as massive as the proton - h ...
... bosons) are the elementary particles that mediate the weak interaction; their symbols are W+, W−, and Z. These bosons are among the heavyweights of the elementary particles. With masses of 80.4 GeV/c2 and 91.2 GeV/c2, respectively, the W and Z bosons are almost 100 times as massive as the proton - h ...
Matter and antimatter: very similar, but not exactly - Physik
... interaction carriers, W and Z (→ weak interaction is short range). The whole space is filled up with a field, the Higgs field, which also gives masses to all quarks and leptons. It does not explain the size of the masses. The Higgs has spin=0. The theory does not predict the mass of the Higgs mH ...
... interaction carriers, W and Z (→ weak interaction is short range). The whole space is filled up with a field, the Higgs field, which also gives masses to all quarks and leptons. It does not explain the size of the masses. The Higgs has spin=0. The theory does not predict the mass of the Higgs mH ...
THINGSYOUNEEDTOKNOW-modern
... The sum of all charge is conserved in the universe. Conservation means all BEFORE = all AFTER Know the RRT Standard Model section Protons are baryons made of u-u-d quarks Neutrons are baryons made of u-d-d quarks All quarks and leptons have antiparticle counterparts. All things the same except oppos ...
... The sum of all charge is conserved in the universe. Conservation means all BEFORE = all AFTER Know the RRT Standard Model section Protons are baryons made of u-u-d quarks Neutrons are baryons made of u-d-d quarks All quarks and leptons have antiparticle counterparts. All things the same except oppos ...
The Higgs Boson and Electroweak Symmetry Breaking
... The Standard Model contains many fermions fields, a separate one for each left- or right-handed quark or lepton. A supersymmetric extension of the Standard Model therefore contains a huge number of elementary scalar fields. The mass terms for all of these fields are forbidden by the combination of t ...
... The Standard Model contains many fermions fields, a separate one for each left- or right-handed quark or lepton. A supersymmetric extension of the Standard Model therefore contains a huge number of elementary scalar fields. The mass terms for all of these fields are forbidden by the combination of t ...
Standard Model
The Standard Model of particle physics is a theory concerning the electromagnetic, weak, and strong nuclear interactions, as well as classifying all the subatomic particles known. It was developed throughout the latter half of the 20th century, as a collaborative effort of scientists around the world. The current formulation was finalized in the mid-1970s upon experimental confirmation of the existence of quarks. Since then, discoveries of the top quark (1995), the tau neutrino (2000), and more recently the Higgs boson (2013), have given further credence to the Standard Model. Because of its success in explaining a wide variety of experimental results, the Standard Model is sometimes regarded as a ""theory of almost everything"".Although the Standard Model is believed to be theoretically self-consistent and has demonstrated huge and continued successes in providing experimental predictions, it does leave some phenomena unexplained and it falls short of being a complete theory of fundamental interactions. It does not incorporate the full theory of gravitation as described by general relativity, or account for the accelerating expansion of the universe (as possibly described by dark energy). The model does not contain any viable dark matter particle that possesses all of the required properties deduced from observational cosmology. It also does not incorporate neutrino oscillations (and their non-zero masses).The development of the Standard Model was driven by theoretical and experimental particle physicists alike. For theorists, the Standard Model is a paradigm of a quantum field theory, which exhibits a wide range of physics including spontaneous symmetry breaking, anomalies, non-perturbative behavior, etc. It is used as a basis for building more exotic models that incorporate hypothetical particles, extra dimensions, and elaborate symmetries (such as supersymmetry) in an attempt to explain experimental results at variance with the Standard Model, such as the existence of dark matter and neutrino oscillations.