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Particle Physics 2016
December 08-10, 2016
Volume 4 Issue 3(Suppl) J Astrophys Aerospace Technol
ISSN: 2329-6542 JAAT, an open access journal
conferenceseries .com
December 08-10, 2016 Dallas, Texas, USA
Astrophysics and Particle PhysicsInternational Conference on
J Astrophys Aerospace Technol 2016, 4:3(Suppl)
Diphoton Higgs decay in an U(1)′ model
Juan Pablo Rubio1,2
1Universidad Nacional de Colombia, Colombia
2Ciudad Universitaria, Mexico
At present, the possible confirmation by the LHC of a scalar particle identified as the Higgs boson has increased the study
of its different decay channels, where the diphoton decay is one of the most prominent processes, because of the excess
reported by LHC. These excesses may be associated with new symmetries in models beyond the standard model. In particular,
family non-universal U(1)’ symmetry models have many motivations to be considered, because they involve a large number
of phenomenological consequences and theoretical aspects as flavor physics, physics of neutrinos, dark matter, among other
effects. These models also involve a new neutral boson Z’, something else new anomalies appear. It is necessary to extend of
the fermionic spectrum in order to obtain a chiral theory free of anomalies. On the other hand, the new symmetries require
extended scalar sectors to generate the spontaneous breaking of the new Abelian symmetry and to get masses for the new
gauge boson Z’ and the extra fermionic content. In particular, the scalar sector is extended with two scalar doublets and two
singlets, where one of the singlets is postulated as a dark matter (DM) candidate. The purpose of this work is to calculate the
new contribution to the diphoton channel decay width of the Higgs, as it offers a clear signal of new physics associated with
the scalar sector, where loop contribution from charged Higgs bosons are taken into account. Also, since the signal strength
depends on the ratio with the total of Higgs boson decay, it is possible to evaluate the effects of a light DM component as an
invisible final state.
Measurements with diverse concepts in quantum/particle physics
Payman Sheriff
Heriot-Watt University, UK
Much of particle physics uses data from new measurements, average measured properties of gauge bosons, leptons, quarks,
mesons and baryons; there are many that are new or heavily revised including those on quark-mixing matrix, top quark,
muon anomalous magnetic moment, extra dimensions, particle detectors, cosmic background radiation, dark matter, cosmological
parameters andbigbang cosmology.Themodel is basedongauge theories, ofwhich thefirstwas quantumelectrodynamics, describing
the interactions of light with matter. The core element of particle physics analysis as the name suggests is the physical characteristics
that form the basis of themeasurement. Decoherence theorists, who use various non-standard interpretations of quantummechanics
that deny the projection postulate quantum jumps and even the existence of particles, define the measurement problem as the failure
to observe superpositions such as Schrödinger's cat. Measurements are described with diverse concepts in quantum physics such
as; wave functions/probability amplitudes, evolving unitary and deterministic/preserving information, according to the linear
Schrödinger equation, superposition of states, i.e., linear combinations of wave functions with complex coefficients that carry phase
information and produce interference effects/the principle of superposition, quantum jumps between states accompanied by the
"collapse" of the wave function that can destroy or create information, probabilities of collapses and jumps given by the square of the
absolute value of the wave function for a given state, values for possible measurements given by the eigenvalues associated with the
eigenstates of the combined measuring apparatus and measured system. The expected consequence of Niels Bohr's "Copenhagen
interpretation" of quantum mechanics, was to explain how our measuring instruments, which are mostly macroscopic objects and
treatable with classical physics, can give us information about the microscopic world of atoms and subatomic particles like electrons
and photons. Some define the problem of measurement simply as the logical contradiction between two laws describing the motion
of quantum systems; the unitary, continuous, and deterministic time evolution of the Schrödinger equation versus the non-unitary,
discontinuous, and indeterministic collapse of the wave function. Here, I intend to present a unified dynamics framework using
particles connected by constraints as the fundamental infrastructure that let us treat measurements in a unified manner.