Flavor physics in the quark sector

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This PhD thesis presents a search for Heavy Neutral Leptons (HNLs) using data collected by the CMS experiment at the CERN Large Hadron Collider (LHC). HNLs are hypothetical new particles proposed in several theoretical extensions of the Standard Model (SM) ...

The Standard Model (SM) of particle physics represents our most fundamental knowledge of elementary particles and their interactions. One of the cardinal properties of the SM which has been thoroughly studied during the past years is the so-called Lepton F ...

Based on 7.33 fb(-1) of e(+)e(-) collision data collected by the BESIII detector operating at the BEPCII collider at center-of-mass energies from 4.128 to 4.226 GeV, a search for the Majorana neutrino nu(m) is conducted in the lepton-number-violating decay ...

Results are presented for a test of the compositeness of the heaviest charged lepton, τ, using data collected by the CMS experiment in proton-proton collisions at a center-of-mass energy of 13 TeV at the CERN LHC. The data were collected in 2016–2018 and c ...

A time-dependent, flavour-tagged measurement of CP violation is performed with B0→ D+D− and Bs0→Ds+Ds− decays, using data collected by the LHCb detector in proton-proton collisions at a centre-of-mass energy of 13 TeV corresponding to an integrated luminos ...

The strong-phase differences between

{D}^0\to {K}_{S(L)}^0{\pi}^{+}{\pi}^{-}

and

{\overline{D}}^0\to {K}_{S(L)}^0{\pi}^{+}{\pi}^{-}

decays are one of the most important inputs in measuring the CP violating angle γ via B − → DK − decays. They also p ...

Based on a data sample of (10087 ± 44) × 10 6 J / ψ events taken with the BESIII detector, we search for the flavor-changing neutral current charmonium decay J / ψ → D 0 μ + μ − + c.c. . No significant signal above the background is observed, and the upper ...

Particle accelerators are the drivers for large-scale research infrastructures for particle physics but also for many branches of condensed matter research. The types of accelerator-driven research infrastructures include particle colliders, neutron, muon ...

There is a growing interest in the development of reliable analytical methods for characterizing tire and road wear particles (TRWP). The current research extends the use of single particle analysis techniques to various experimental biota samples. TRWP an ...

I describe the sterile neutrino dark matter candidate and discuss how it may fit into the overall picture of physics beyond the Standard Model. ...

Using (Formula presented) (Formula presented) events collected with the BESIII detector operating at the BEPCII collider, we have observed the decay (Formula presented) for the first time with a statistical significance of (Formula presented). Its branchin ...

Nonreciprocal topological edge states based on external magnetic bias have been regarded as the last resort for genuine unidirectional wave transport, showing superior robustness over topological states with preserved time-reversal symmetry. However, fast ...

Two-level systems (TLSs) are the basic units of quantum computers but face a trade-off between operation speed and coherence due to shared coupling paths. Here, we investigate a TLS given by a singlet-triplet (ST+) transition. We identify a magnetic-field ...

Nuclear medium effects on (Formula presented) meson production are studied using the binary-collision scaled cross section ratio between events of different charged-particle multiplicities from proton-lead collisions. Data, collected by the CMS experiment ...

This thesis links two realms of particle accelerator dynamics and precision particle physics. The achievement of precise luminosity measurement at hadron colliders is enabled with dedicated luminometers. For the Run 3 period, the luminometer upgrade was ...

We study the problem of learning unknown parameters in stochastic interacting particle systems with polynomial drift, interaction, and diffusion functions from the path of one single particle in the system. Our estimator is obtained by solving a linear sys ...

We propose an approach for measuring the moments of the hadronic invariant mass distribution in semileptonic Bs0 meson decays using a sum-of-exclusive technique. Using the present and foreseen knowledge about exclusive semileptonic Bs0 decays, we estimate ...

Metal-organic frameworks (MOFs) are a rapidly growing class of materials that offer great promise in various applications. However, the synthesis remains challenging: for example, a range of crystal structures can often be accessed from the same building b ...

An inclusive search for long-lived exotic particles (LLPs) decaying to final states with a pair of muons is presented. The search uses data corresponding to an integrated luminosity of 36.6 fb(-1) collected by the CMS experiment from the proton-proton coll ...

Combining superconducting resonators and quantum dots has triggered tremendous progress in quantum information, however, attempts at coupling a resonator to even charge parity spin qubits have resulted only in weak spin-photon coupling. Here, we integrate ...

Flavor physics in the quark sector

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Search for Long-Lived Heavy Neutral Leptons with Muons at the CMS Experiment and Characterisation of Scintillating Fibre Trackers

Lepton flavour universality tests and lepton flavour violation searches at LHCb

Search for lepton number violating decays of Ds+ → h-h0e+e+

Search for excited tau leptons in the ττγ final state in proton-proton collisions at = 13 TeV

Measurement of CP violation in B0→ D+D− and Bs0→Ds+Ds− decays

Updated model-independent measurement of the strong-phase differences between D0 and $ {\overline{\textrm{D}}}^0\to {\textrm{K}}_{\textrm{S}/\textrm{L}}^0{\uppi}^{+}{\uppi}^{-} $ decays

Search for the FCNC charmonium decay J/ψ → D0μ+μ− + c.c

Energy-Efficient Particle Accelerators for Research

Characterization of tire and road wear particles in experimental biota samples

Sterile neutrinos as dark matter

Study of the decay (Formula presented)

Anomalous‐Chern Steering of Topological Nonreciprocal Guided Waves

A dephasing sweet spot with enhanced dipolar coupling

Search for Nuclear Modifications of (Formula presented) Meson Production in (Formula presented)-Pb Collisions at (Formula presented)

Precision luminosity measurement at hadron colliders

A Method of Moments Estimator for Interacting Particle Systems and their Mean Field Limit

Inclusive semileptonic Bs0 meson decays at the LHC via a sum-of-exclusive modes technique: possibilities and prospects

How Reproducible is the Synthesis of Zr-Porphyrin Metal-Organic Frameworks? An Interlaboratory Study

Search for long-lived particles decaying to final states with a pair of muons in proton-proton collisions at √s=13.6 TeV

Strong coupling between a microwave photon and a singlet-triplet qubit