Rare $ B $ Decays as Tests of the Standard Model
... the FCNC interactions are encoded in Wilson coefficients of dimension-six operators that are made out of the light SM fields, i.e. leptons, the five lightest quarks, photons and gluons. This not only allows to calculate QCD corrections to weak decays perturbatively but is also useful when studying p ...
... the FCNC interactions are encoded in Wilson coefficients of dimension-six operators that are made out of the light SM fields, i.e. leptons, the five lightest quarks, photons and gluons. This not only allows to calculate QCD corrections to weak decays perturbatively but is also useful when studying p ...
Measurement of the Top Quark Pair Production Cross Section with
... and µ+jets events recorded with the CDF II detector. The data correspond to 1.12 fb−1 of pp collisions with center-of-mass energy 1.96 TeV taken during Run 2 of the Fermilab Tevatron. We identify tt candidate events by requiring at least one secondary vertex b-tag, and we measure a production cross ...
... and µ+jets events recorded with the CDF II detector. The data correspond to 1.12 fb−1 of pp collisions with center-of-mass energy 1.96 TeV taken during Run 2 of the Fermilab Tevatron. We identify tt candidate events by requiring at least one secondary vertex b-tag, and we measure a production cross ...
Reconstruction of ttZ Events Using Kinematic Likelihood Fits at the
... matter, its constituents and the forces acting between them. Visible matter is formed by spin-½ particles called fermions. They are separated into quarks and leptons, according to their different coupling behaviour, each consisting of three families. For all twelve fermions there exists an antiparti ...
... matter, its constituents and the forces acting between them. Visible matter is formed by spin-½ particles called fermions. They are separated into quarks and leptons, according to their different coupling behaviour, each consisting of three families. For all twelve fermions there exists an antiparti ...
Plasma_02 - StealthSkater
... Neutrinos were the "ghosts" of the particle world. Even if they really existed, scientists saw no way to detect them. [Jonas Schultz] (University of California, Irvine): They concluded that it was a practical impossibility - that no one would ever see these neutrinos. And I think that's what put pe ...
... Neutrinos were the "ghosts" of the particle world. Even if they really existed, scientists saw no way to detect them. [Jonas Schultz] (University of California, Irvine): They concluded that it was a practical impossibility - that no one would ever see these neutrinos. And I think that's what put pe ...
the unit nature of matter - Starlight Publishing Company
... the current (energy rotation) around the unit of matter generates a magnetic field, the direction of which follows either the right hand rule or the left hand rule, depending on the charge of the current. The positive current of the positron generates a magnetic field that follows the right hand rul ...
... the current (energy rotation) around the unit of matter generates a magnetic field, the direction of which follows either the right hand rule or the left hand rule, depending on the charge of the current. The positive current of the positron generates a magnetic field that follows the right hand rul ...
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 ...
The Excitement of Neutrino Physics
... The lightest massive particles A million times lighter than the electron No direct mass measurement yet The most weakly interacting particles Invisible: do not interact with light Stopping radiation with lead shielding: Stopping α, β, γ radiation: 50 cm Stopping neutrinos from the Sun: light years ! ...
... The lightest massive particles A million times lighter than the electron No direct mass measurement yet The most weakly interacting particles Invisible: do not interact with light Stopping radiation with lead shielding: Stopping α, β, γ radiation: 50 cm Stopping neutrinos from the Sun: light years ! ...
The CKM Matrix and CP Violation
... the CKM matrix • To date CP violation has been observed only in the quark sector • Because we are dealing with quarks, which are only observed as bound states, this is a fairly complicated subject. Here we will approach it in two steps: • i) Consider particle – anti-particle oscillations without CP ...
... the CKM matrix • To date CP violation has been observed only in the quark sector • Because we are dealing with quarks, which are only observed as bound states, this is a fairly complicated subject. Here we will approach it in two steps: • i) Consider particle – anti-particle oscillations without CP ...
Slides - indico.jinr.ru – Indico
... Following the PAC recommendation, in November 2016 another beam measurements were fulfilled with a different tritium concentration (0.08% tritium in the T/H mixture) and in two different detector geometries Results (preliminary!) of the November run: 1. Predictions about the dependence of the react ...
... Following the PAC recommendation, in November 2016 another beam measurements were fulfilled with a different tritium concentration (0.08% tritium in the T/H mixture) and in two different detector geometries Results (preliminary!) of the November run: 1. Predictions about the dependence of the react ...
the capture of magnetic inelastic dark matter in the sun.
... The nature of dark matter is one of the most intriguing mysteries in physics. One of our best candidates to explain its properties is the WIMP, or Weakly Interacting Massive Particle. These particles would be produced by thermal processes in the early universe, and freeze-out at their present densit ...
... The nature of dark matter is one of the most intriguing mysteries in physics. One of our best candidates to explain its properties is the WIMP, or Weakly Interacting Massive Particle. These particles would be produced by thermal processes in the early universe, and freeze-out at their present densit ...
pptx - Curtis A. Meyer
... Should we expect to see these? MIT Bag Model – quarks confined to a finite space, add a TE gluon JPC=1+- . This leads to four new nonets of “hybrid mesons” 1-- 0-+ 1-+ and 2-+ . ...
... Should we expect to see these? MIT Bag Model – quarks confined to a finite space, add a TE gluon JPC=1+- . This leads to four new nonets of “hybrid mesons” 1-- 0-+ 1-+ and 2-+ . ...
Automatic scanning of emulsion films for the OPERA - INFN
... In e+ e− collisions at SLAC was later found evidence for a third type of lepton τ − to which was associated a third neutrino ντ . During the sixties and seventies, electron and muon neutrinos of high energy were used to probe the composition of nucleons. The experiments gave evidence for quarks and ...
... In e+ e− collisions at SLAC was later found evidence for a third type of lepton τ − to which was associated a third neutrino ντ . During the sixties and seventies, electron and muon neutrinos of high energy were used to probe the composition of nucleons. The experiments gave evidence for quarks and ...
A search for anomalous heavy-flavor quark production in association with w bosons
... through a door into an unfamiliar world is always difficult. When it’s your first of these doors, sometimes it takes a bit of a nudge to take that step. Harriet provided something more like a healthy shove, and for that I will always be grateful. With my high-school experiences and, no doubt, a heal ...
... through a door into an unfamiliar world is always difficult. When it’s your first of these doors, sometimes it takes a bit of a nudge to take that step. Harriet provided something more like a healthy shove, and for that I will always be grateful. With my high-school experiences and, no doubt, a heal ...
Search for Signatures of New Heavy Top Quark of the Fourth
... Z bosons decays, and 2 hadrons are produced from decaying the W boson and two b jets. We searched for the t ′ by analyzing Monte Carlo data generated by MadGraph5, CalcHEP and Pythia8. The discoveries of the top quark at the Tevatron have been many searches for a possible new generation of fermions. ...
... Z bosons decays, and 2 hadrons are produced from decaying the W boson and two b jets. We searched for the t ′ by analyzing Monte Carlo data generated by MadGraph5, CalcHEP and Pythia8. The discoveries of the top quark at the Tevatron have been many searches for a possible new generation of fermions. ...
NEUTRINO ODYSSEY
... confirming evidence from earlier experiments, showed the oscillation of muon neutrinos. This confirmation of oscillations shook the neutrino world. Super-Kamiokande also confirmed the observation of the solar neutrino deficit first seen by Davis and Bahcall. In the process, they took the first image ...
... confirming evidence from earlier experiments, showed the oscillation of muon neutrinos. This confirmation of oscillations shook the neutrino world. Super-Kamiokande also confirmed the observation of the solar neutrino deficit first seen by Davis and Bahcall. In the process, they took the first image ...
Finite-Volume Electromagnetic Corrections to the Masses of Mesons
... when the electromagnetic gauge field is subject to periodic boundary conditions (PBCs) [15–17]. However, a uniform background charge density can be introduced to circumvent this problem and restore these laws. This is equivalent to removing the zero modes of the photon in a finite-volume (FV) calcul ...
... when the electromagnetic gauge field is subject to periodic boundary conditions (PBCs) [15–17]. However, a uniform background charge density can be introduced to circumvent this problem and restore these laws. This is equivalent to removing the zero modes of the photon in a finite-volume (FV) calcul ...
Document
... with several unknown parameters => an exciting experimental program for at least 25 years *) including leptonic CP & T violations ...
... with several unknown parameters => an exciting experimental program for at least 25 years *) including leptonic CP & T violations ...
Multi-Majoron Modes for Neutrinoless Double
... decays, provided we relax the conditions that are cast on the relevant masses by big bang nucleosynthesis constraints. The estimated rate for the n = 7 decays appears to be too small to be detectable. This paper has the following organization. The next section computes the ββϕϕ decay rate for the t ...
... decays, provided we relax the conditions that are cast on the relevant masses by big bang nucleosynthesis constraints. The estimated rate for the n = 7 decays appears to be too small to be detectable. This paper has the following organization. The next section computes the ββϕϕ decay rate for the t ...
Neutrino Oscillations
... The question of how neutrino masses arise has not been answered conclusively. In the Standard Model of particle physics, fermions only have mass because of interactions with the Higgs field (see Higgs boson). These interactions involve both left- and right-handed versions of the fermion (see chirali ...
... The question of how neutrino masses arise has not been answered conclusively. In the Standard Model of particle physics, fermions only have mass because of interactions with the Higgs field (see Higgs boson). These interactions involve both left- and right-handed versions of the fermion (see chirali ...
The quark model and deep inelastic scattering
... created in strong interactions — particles which did not fit into the two-quarkflavour model and were called ‘strange particles’. Bubble chamber experiments were used to examine the properties of beams of strange particles and demonstrated that the strange particles could travel macroscopic distance ...
... created in strong interactions — particles which did not fit into the two-quarkflavour model and were called ‘strange particles’. Bubble chamber experiments were used to examine the properties of beams of strange particles and demonstrated that the strange particles could travel macroscopic distance ...
The Weak Interaction - University of Warwick
... The nuclear β-decay caused a great deal of anxiety among physicists. Both α- and γ-rays are emitted with discrete spectra, simply because of energy conservation. The energy of the emitted particle is the same as the energy difference between the initial and final state of the nucleus. It was much mo ...
... The nuclear β-decay caused a great deal of anxiety among physicists. Both α- and γ-rays are emitted with discrete spectra, simply because of energy conservation. The energy of the emitted particle is the same as the energy difference between the initial and final state of the nucleus. It was much mo ...
What does a spark chamber detect?
... little finger's nail every second, and their main source is thought to be from the Sun. They are so unreactive, that if they were to travel through a light year worth of lead, there would only be 50% change that it would hit anything along the way. Much experimental work is currently being done to ...
... little finger's nail every second, and their main source is thought to be from the Sun. They are so unreactive, that if they were to travel through a light year worth of lead, there would only be 50% change that it would hit anything along the way. Much experimental work is currently being done to ...
Lecture 1
... Just as for J/ψ, decay involves coupling to virtual photon. The φ is ssbar: electric charge factor (-1/3)2 Both ρ and ω are mixtures of u.ubar and d.dbar, but there’s a factor of ~10 difference in leptonic width… The u and d quarks play a special role in the strong interactions because their masses ...
... Just as for J/ψ, decay involves coupling to virtual photon. The φ is ssbar: electric charge factor (-1/3)2 Both ρ and ω are mixtures of u.ubar and d.dbar, but there’s a factor of ~10 difference in leptonic width… The u and d quarks play a special role in the strong interactions because their masses ...
SEARCH FOR HEAVY LEPTONS FROM TIME
... Once Nino came to my office to tell me about his ideas of studying lepton pair production at PS. I was still not Director General, but Research Director at CERN. In addition to (ee) and () pairs, he wanted to search for (e) pairs as a signature of a new lepton carrying its own lepton number ...
... Once Nino came to my office to tell me about his ideas of studying lepton pair production at PS. I was still not Director General, but Research Director at CERN. In addition to (ee) and () pairs, he wanted to search for (e) pairs as a signature of a new lepton carrying its own lepton number ...