PIC2018: XXXVIII International Symposium on Physics in Collision, Bogota, Colombia

Session

Posters session

13 Sept 2018, 16:45

Other Institutes

10. ATLAS Outreach in LatinAmerica: how Open Data&Source + Real&Virtual Visits help to the training of students and researchers in High Energy Physics

Arturo Sanchez Pineda (Abdus Salam Int. Cent. Theor. Phys. (IT))

The members of large High Energy Physics (HEP) experiments come from all over the World. Thereby, they understand that one significant challenge in teaching experimental HEP is the current location of many potential and precious students and young researchers. In the case of ATLAS, many of its members come from a Latin-American country, and they recognise the huge potential that the -always...

19. Charged lepton flavor violation and electric dipole moments in the inert Zee model

Dr Róbinson Longas (Universidad de Antioquia)

The inert Zee model is an extension of the famous Zee model for neutrino masses to allow for a solution to the dark matter problem that involves two vector-like leptons, a doublet and a singlet of $SU(2)_L$, and two scalars, also a doublet and a singlet of $SU(2)_L$, all of them being odd under an exact $Z_2$ symmetry. The introduction of the $Z_2$ guarantees one-loop neutrino masses,...

13. Colored scotogenic

Prof. Diego Restrepo (Universidad de Antioquia)

We propose a simple theory for the idea that cosmological dark matter (DM) may be present today mainly in the form of stable neutral hadronic thermal relics. In our model neutrino masses arise radiatively from the exchange of colored DM constituents, giving a common origin for both dark matter and neutrino mass. The exact conservation of B-L symmetry ensures dark matter stability and the...

18. Dark matter phenomenology in the Inert Zee Model

Mrs Alexandra Gaviria (Universidad de Antioquia)

In this work we have explored the phenomenology of dark matter in the Inert Zee Model (IZM), which is an extension of the standard model that aims to solve simultaneously the dark matter problem and the neutrino masses and mixings, through the addition of new scalar and fermion fields, and the introduction of a $Z_2$ symmetry to stabilize dark matter. Since that the phenomenology of the...

11. Dark photons production in positron beam dump experiments via resonant $e^+ e^-$ annihilation

Cristian ruiz (Universidad de Antioquia)

We explore the foreseeable sensitivity of the Frascati PADME experiment to searching, with the resonance annihilation technique, the $17\,$MeV dark photon invoked to explain the $^8$Be anomaly in nuclear transitions. This involves a positron beam dump experiment where due to the continue loss of energy from soft photon bremsstrahlung in the first few radiation lengths of the dump, the positron...

16. Electroweak extensions of Standard Model and scotogenic models

Darío Blandon (Universidad de Antioquia)

We study the dark matter stability due to the existence of an additional U(1) gauge symmetry. Furthermore, we generate neutrino masses at the radiative level via an effective dimension five Weinberg operator. The presence of an extra Abelian symmetry allows accommodating the recent LHCb anomalies in B → K(K∗)μ+μ− decays, by fixing some parameters of the model.

14. Electroweak phase transition in models beyond the Standard Model

ALEJANDRO CORREA LOPEZ (Universidad de Antioquia)

In this work we investigate the conditions and mathematical tools that are necessary to generate a strong first-order electroweak phase transition (EWPT) in three models that extends the Standard Model (SM) with extra fields and extra symmetries. Concretely, we consider the real singlet scalar model, the inert doublet model (IDM) and he scotogenic model. Finally we establish the necessary...

17. Inclusive Displaced Vertex Searches for Heavy Neutral Leptons at the LHC

Nicolás Bernal (Universidad Antonio Nariño)

The inclusion of heavy neutral leptons to the Standard Model particle content could provide solutions to many open questions in particle physics and cosmology. The modification of the charged and neutral currents from active-sterile mixing of neutral leptons can provide novel signatures in Standard Model processes. We revisit the displaced vertex signature that could occur in collisions at the...

3. Looking for lepton-number-violating processes in $|\Delta L| = 2$ decays of $B_s$ meson and $\Lambda_b$ baryon

Nestor Quintero Poveda (Universidad Santiago de Cali)

Lepton-number violation can be induced by the exchange of an on-shell Majorana neutrino $N$ in rare semileptonic $|\Delta L|=2$ decays of the $B_s$ meson and $\Lambda_b$ baryon. We investigate the production of such a heavy sterile neutrino through these four-body $\mu^+\mu^+$ channels and explore the sensitivity that can be reached at the LHCb and CMS experiments. For heavy neutrino...

4. Measurement of nuclear modification of J/ψ and ψ’ production at the E-906/SeaQuest experiment

Ms Catherine Ayuso (University of Michigan and FermiLab)

A measurement of the suppression of J/ψ and ψ’ production in high-energy heavy ion interactions has been suggested to be an important probe in identifying the presence and properties of quark-gluon plasma (QGP). However, a similar quarkonium production depletion observed in p-A interactions at lower energies makes it pivotal to understand the effects of cold nuclear matter (CNM). By doing...

5. Millepede alignment of the Belle 2 sub-detectors after first collisions

Tadeas Bilka (Charles University (CZ))

The Belle II detector at the SuperKEKB accelerator observed the first collisions in April this year. Until mid-summer, the first commissioning run is using a reduced version of the full vertex detector. Nevertheless, this phase is an excellent opportunity to improve and test the alignment and calibration procedures being prepared for the first physics runs starting in spring 2019.

The...

9. Neutral and Charged Higgs boson phenomenology at LHeC and FCC-he

Dr Siba Prasad Das (Uniandes)

We will give a short overview of neutral and charged Higgs boson phenomenology
at Large Hadron electron Collider (LHeC) and Future Circular Collider hadron-electron
(FCC-he) mode. We discuss the relevant theoretical and experimental constraints within
Next-to-Minimal Supersymmetric Models (NMSSM).

References (based on 1-3):
1.https://arxiv.org/abs/1806.08361 (under review in...

6. Neutrino Masses and Mixing in the two Higgs doublet model type-III

Julian Steven Gutierrez Saavedra (National University of Colombia)

The experimental measures of flavor mixing angles of quarks and neutrinos, satisfy the empirical relations $\theta_{12}^{q}+\theta_{12}^{l}\approx\pi/4$ and $\theta_{23}^{q}+\theta_{23}^{l}\approx\frac{\pi}{4}$, where $\theta_{12}^{q}$is the mixing angle between the two first generations for the quarks sector and $\theta_{12}^{l}$ is the corresponding for the lepton sector, while...

2. Search for a structure in BsPi with the ATLAS Detector

ATLAS Collaboration

A search for the narrow structure, X(5568), which was first reported by the D0 Collaboration in the decay sequence X→B0sπ±; B0s→J/ψϕ, is presented using data collected by the ATLAS Experiment at 7 and 8 TeV centre-of-mass energies. Upper limits on a potential Bspi resonance in the range 5550 MeV to 5700 MeV are reported.

15. The Matrix Element Method applied to a Dark Matter problem

Amalia Betancur Rodríguez

In this work, we demonstrate the use of the Matrix Element Method, a form of multivariate analysis, for the case of a resonance produced at the LHC that decays into a lepton and an invisible particle, such as a Dark Matter particle. We show that for simple topologies like single and pair production of semi-invisible decaying resonances, where little information is available, it is possible to...