NNV najaarsvergadering

Session

Parallel

4 Nov 2022, 12:00

de Werelt (Lunteren)

11. Combined SMEFT interpretation of Higgs and electroweak measurements

Andrea Visibile

04/11/2022, 12:00

Standard Model Effective Field Theory (SMEFT) provides a great framework to interpret combined measurements in order to spot the presence of physics beyond the Standard Model at energies that we cannot yet reach with our instruments. Measurements of cross sections, branching ratios and kinematic distributions can be combined in the SMEFT framework to ultimate test the SM without making any...

5. Detection and characterization of strongly-lensed gravitational waves

Justin Janquart

04/11/2022, 12:00

Like light, gravitational waves can be deflected by massive objects along their travel path from source to observer. Depending on the mass of the lens, the wave can get distorted, magnified, or split into multiple potentially detectable images. The latter case is called strong lensing and happens when the characteristic size of the lens is much larger than the gravitational-wave wavelength. In...

8. Fingerprinting CP-violating New Physics with Rare B Meson Decays

Anders Rehult

04/11/2022, 12:00

Of all the particle decays that could be studied in the search for new physics beyond the Standard Model (SM), few are as promising as the rare B meson decays. In recent years, these decays have shown anomalies, tensions between SM predictions and experimental data. If these are signs of new physics, the key question is what type of new physics could be causing the anomalies. Interestingly,...

10. Demonstrators of the ATLAS HGTD

Marion Missio

04/11/2022, 12:20

The high-luminosity (HL) phase of the Large Hadron Collider (LHC) will start in 2029 and will be able to deliver an integrated luminosity up to 4000 fb-1 A direct consequence of this update will be to deal with high event rate i.e within the same bunch crossing, an average of 200 proton-proton collisions is estimated (against 50 in Run3) with 1.44 vertices/mm. Distinguishing between collisions...

6. Measurement of electroweak Z(νν)γjj production and limits on anomalous quartic gauge couplings in ATLAS

Diana Pyatiizbyantseva

04/11/2022, 12:20

Measurements of multiboson production at the LHC probe the electroweak gauge structure of the Standard Model for contributions from anomalous couplings. Processes involving quartic gauge boson couplings are of particular significance. In this talk, recent ATLAS results on the measurement of electroweak production of a Zγ pair in association with two jets when Z decays to neutrinos producing...

7. Status of frequency dependent squeezing for Advanced Virgo Plus

Yuefan Guo

04/11/2022, 12:20

As one of the essential upgrades from the Third Observation run(O3) to the Forth Observation run(O4), frequency-dependent squeezing(FDS) aims to reduce the quantum noise, both the shot noise and radiation pressure noise, of the gravitational wave detectors. FDS combines the frequency independent squeezing(FIS), already applied in the O3 run, with a detuned 300m Fabry Perot cavity built at the...

16. How well can we constrain modified gravitational wave propagation with strong lensing?

Harsh Narola (Utrecht University)

04/11/2022, 14:00

Just like light waves, gravitational waves (GWs) can undergo gravitational lensing. When the characteristic size of the lens is much larger than the wavelength of the GWs, the phenomenon is referred to as strong lensing. Strong lensing produces multiple copies of the same gravitational wave event which arrive at the detector as repeated signals. When the source is quadruply lensed, we can...

15. Measuring the atmospheric tau-neutrino appearance with KM3NeT

Bouke Jisse Jung

04/11/2022, 14:00

Since the discovery of anomalies in the solar and atmospheric neutrino fluxes over 20 years ago, it has been firmly established by neutrino experiments around the world that neutrinos are massive particles and that the neutrino flavour eigenstates constitute linear super-positions of the neutrino mass eigenstates.
Most statistical power in constraining this massive three-neutrino paradigm...

13. Tidal response from scattering and the role of analytic continuation

Gastón Creci (Utrecht University)

04/11/2022, 14:00

The tidal response of a compact object is a key gravitational-wave observable encoding information about its interior. This link is subtle due to the nonlinearities of general relativity. We
show that considering a scattering process bypasses challenges with potential ambiguities, as the
tidal response is determined by the asymptotic in- and outgoing waves at null infinity. As an application...

17. Ion optical simulation for the NEXT solenoid separator

Arif Soylu (VSI/RUG)

04/11/2022, 14:20

The NEXT project aims to study Neutron-rich, EXotic, heavy nuclei produced in multi-nucleon Transfer reactions[1]. Transfer products of interest will be focused and separated from unwanted by-products and unreacted primary beam by a 3T solenoid magnet with an 87-cm wide bore.

We developed a Python code to simulate the traces of ions through the magnetic field of the solenoid magnet. The...

9. New collider searches for dark photon

Anh Vu Phan (Radboud University)

04/11/2022, 14:20

The dark photon is a well-motivated new particle, arising from a renormalizable interaction with the photon field. This so-called vector portal can lead to a dark sector, which can contain candidates for dark matter. In this talk, I discuss searches for dark photons at photon-electron colliders, with applications to LUXE and a future Gamma Factory, and electron-positron colliders, with a focus...

12. Time is of the essence: Depleted Monolithic Silicon Sensors

Uwe Kraemer (DR&D)

04/11/2022, 14:20

The ultimate goal for tracking detectors is the combination of excellent spatial resolution, low material budget, high radiation tolerance and excellent timing resolution for the ultimate tracking performance.
Many different approaches are taken to reach this goal, with CMOS based silicon detectors providing one of the most promising angles of approach.
The Nikhef Detector R&D group, as a...

20. New test of Lepton Flavour Universality with rare ${\mathrm{\Lambda }}_b^0\to \mathrm{\Lambda }{\ell }^{+}{\ell }^{-}$ decays at LHCb

Jan de Boer

04/11/2022, 14:40

Over the past few years, interest in the $b\to s{\ell }^{+}{\ell }^{-}$ transition has grown due to its contribution to measurements that show hints of lepton flavour universality violation. Lepton flavour universality (LFU) is the uniform behaviour of the electron, muon and tau leptons under the electroweak interaction and is an intrinsic characteristic of the Standard Model (SM). The $b...

18. Searching for ultra-high energy neutrinos at the Pierre Auger Observatory

Mohit Saharan

04/11/2022, 14:40

The Pierre Auger Observatory is the world’s largest cosmic ray detector array. It measures the properties of cosmic rays above ${10}^{17}$ eV with an array of 1600 water Cherenkov detectors (WCD) spread over an area of $3000{\mathrm{km}}^2$ overlooked by 27 Fluorescence Detectors. The WCD array can also detect neutrinos above ${10}^{17}$ eV. No neutrinos have been detected so far, leading to...

25. Theoretical study of properties of radioactive molecules

Aleksandra Kiuberis (Van Swinderen Institute for Particle Physics and Gravity, Faculty of Science and Engineering, University of Groningen)

04/11/2022, 14:40

Heavy diatomic molecules are currently considered to be among the most sensitive systems used in the search for the P,T-violating effects and in probing the Standard Model of particle physics. In certain molecules effects resulting from both parity violation and time-reversal violation (P,T - odd effects) are considerably enhanced with respect to atomic systems. The strength of these...

21. A deep learning pipeline for core-collapse supernova searches

Melissa Lopez

04/11/2022, 15:30

Core-collapse supernova (CCSN) explosions are among the most energetic events in the Universe, and their detection in gravitational waves is a challenging task, yet to be achieved. In this work, we present a convolutional neural network-based pipeline to detect these kinds of signals, employing time-frequency images.
We train and validate our convolutional neural network using...

14. Bs --> K form factors and their impact on CKM elements

Carolina Bolognani (Maastricht University)

04/11/2022, 15:30

The probabilities for flavour transitions between quarks via the weak interaction are parametrised by the different elements of the Cabibbo-Kobayashi-Maskawa (CKM) matrix. There is a long standing puzzle related to these, in which the elements that describe the up-bottom ( Vub ) and charm-bottom ( Vcb ) transitions show a tension when determined in exclusive decays (when the final state is...

24. Latest results of KamLAND-Zen: the most stringent limit on the half-life of neutrinoless double beta decay.

Kelly Weerman

04/11/2022, 15:30

There is currently no proof that neutrinos and antineutrinos are different particles, contributing to the theory that neutrinos are in fact Majorana. We hope to verify the theory through neutrinoless double beta decay ($0\nu \beta \beta$), which could possibly take place in xenon. However, this process is extremely rare and therefore requires a super sensitive detector. The world leading...

23. Correlations between strange hadrons in ALICE

Rik Spijkers

04/11/2022, 15:50

Multi-strange baryons offer a unique opportunity to study the role of di-quark production in baryon formation processes. The Lund string fragmentation model is the most widely used description of hadron formation. In this model, the quarks that hadronize are produced through a phenomenon called string breaking, where the string is an analogy for the strong force that acts between two quarks....

19. Generating template banks for gravitational waves searches in exotic binary black hole regions

Stefano Schmidt

04/11/2022, 15:50

We introduce a novel method to generate a bank of gravitational-waveform templates of binary black hole (BBH) coalescences for matched-filter searches in LIGO and Virgo data. Unlike the standard approach, our method relies on a numerical metric approximation of the distance between templates, which makes the template placement orders of magnitude faster than with existing techniques.
Our...

22. VULCAN: Studying the fluorescence response of PTFE to incident VUV light in cryogenic conditions

Emily Brookes

04/11/2022, 15:50

Rare-event searches such as dark matter direct detection experiments rely on accurate detection of scintillation photons to observe signals from very low-energy events. It has been suggested that materials used in the construction of these experiments, such as PTFE, can fluoresce under excitation from the target material’s scintillation light. This scintillation light is in the vacuum...