A5040680611- Cosmology and Gravitation Theories
- Dark Matter and Cosmic Phenomena
- Particle physics theoretical and experimental studies
- Black Holes and Theoretical Physics
- Geophysics and Gravity Measurements
- Pulsars and Gravitational Waves Research
- Computational Physics and Python Applications
- Quantum Chromodynamics and Particle Interactions
- Solar and Space Plasma Dynamics
- Galaxies: Formation, Evolution, Phenomena
- Radio Astronomy Observations and Technology
- advanced mathematical theories
- Relativity and Gravitational Theory
- Astrophysics and Cosmic Phenomena
- Neuroscience of respiration and sleep
- Obstructive Sleep Apnea Research
- High-Energy Particle Collisions Research
- Chronic Obstructive Pulmonary Disease (COPD) Research
- Cold Atom Physics and Bose-Einstein Condensates
- Noncommutative and Quantum Gravity Theories
- Neutrino Physics Research
- Sleep and related disorders
- Particle Detector Development and Performance
- Quantum, superfluid, helium dynamics
- Asthma and respiratory diseases
University of Warsaw
2021-2025
Institute of Theoretical Physics
2025
Istituto Nazionale di Fisica Nucleare, Sezione di Roma I
2021-2023
Queensland Health
2023
National Allergy Asthma Bronchitis Institute
2012-2022
University Hospitals Plymouth NHS Trust
2021-2022
Lawrence Berkeley National Laboratory
2022
University of California, Berkeley
2021-2022
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati
2018-2021
Roma Tre University
2018-2021
Abstract High energy collisions at the High-Luminosity Large Hadron Collider (LHC) produce a large number of particles along beam collision axis, outside acceptance existing LHC experiments. The proposed Forward Physics Facility (FPF), to be located several hundred meters from ATLAS interaction point and shielded by concrete rock, will host suite experiments probe standard model (SM) processes search for physics beyond (BSM). In this report, we review status civil engineering plans explore...
Abstract In this paper, we analyse sound waves arising from a cosmic phase transition where the full velocity profile is taken into account as an explanation for gravitational wave spectrum observed by multiple pulsar timing array groups. Unlike broken power law used in literature, scenario after peak depends on macroscopic properties of transition, allowing better fit with (PTA) data. We compare best that obtained using usual and, unsurprisingly, find (GW) utilizes profile. Even more...
A bstract The relic density of Dark Matter (DM) in the freeze-in scenario is highly dependent on evolution history universe and changes significantly a non-standard (NS) cosmological framework prior to Big Bang Nucleosynthesis (BBN). In this scenario, an additional species dominates energy budget at early times (before BBN), resulting larger expansion rate given temperature compared standard radiation-dominated (RD) universe. To investigate production DM we consider both RD NS picture before...
Abstract Supermassive black hole binaries source gravitational waves measured by Pulsar Timing Arrays. The frequency spectrum of this stochastic background is predicted more precisely than its amplitude. We argue that Dark Matter friction can suppress the around nHz frequencies, where it measured, allowing to derive robust and significant bounds on density, which, in turn, controls indirect detection signals from galactic centers. A precise would translate a tomography DM density profile,...
Chronic obstructive pulmonary disease (COPD) is a major public health problem in India. Although several International guidelines for diagnosis and management of COPD are available, yet there lot gaps recognition India due to vast differences availability affordability healthcare facilities across the country. The Indian Chest Society (ICS) National College Physicians (NCCP) have joined hands come out with these evidence-based help physicians at all levels diagnose manage scientific manner....
The symmetry breaking of grand unified gauge groups in the early Universe often leaves behind relic topological defects such as cosmic strings, domain walls, or monopoles. For some chains, hybrid can form where strings attach to walls monopoles strings. In general, are unstable, with one defect ``eating'' other via conversion its rest mass into other's kinetic energy and, subsequently, decaying gravitational waves. this work, we determine wave spectrum from 1) destruction a string network by...
Hawking evaporation of primordial black holes (PBHs) can facilitate the generation matter-antimatter asymmetry. We focus on ultra-low mass PBHs that briefly dominate universe and evaporate before big bang nucleosynthesis. propose a novel test this scenario by detecting its characteristic doubly peaked gravitational wave (GW) spectrum in future GW observatories. Here first order adiabatic perturbation from inflation isocurvature perturbations due to PBH distribution, source tensor...
We analyze the classically scale-invariant $B\ensuremath{-}L$ model in context of resonant leptogenesis with recently proposed mass-gain mechanism. The symmetry breaking this scenario is associated a strong first-order phase transition that gives rise to detectable gravitational waves (GWs) via bubble collisions. same also Majorana mass right-handed neutrinos inside bubbles, and their out-of-equilibrium decays can produce observed baryon asymmetry Universe leptogenesis. show current...
A bstract Ultra-low mass primordial black holes (PBH), which may briefly dominate the energy density of universe but completely evaporate before big bang nucleosynthesis (BBN), can lead to interesting observable signatures. In our previous work, we studied generation a doubly peaked spectrum induced stochastic gravitational wave background (ISGWB) for such scenario and explored possibility probing class baryogenesis models wherein emission massive unstable particles from PBH evaporation...
A bstract Light primordial black holes (PBHs) with masses smaller than 10 9 g (10 − 24 M ⊙ ) evaporate before the onset of Big-Bang nucleosynthesis, rendering their detection rather challenging. If efficiently produced, they may have dominated universe energy density. We study how such an early matter-dominated era can be probed successfully using gravitational waves (GW) emitted by local and global cosmic strings. While previous studies showed that a matter generates single-step suppression...
A bstract We investigate how superradiance affects the generation of baryon asymmetry in a universe with rotating primordial black holes, considering scenario where scalar boson is coupled to heavy right-handed neutrinos. identify regions parameter space production enhanced due superradiance. This enhancement, subsequent decay into right handed neutrinos, results non-thermal creation lepton asymmetry. show that successful leptogenesis achieved for masses holes range order O (0 . 1 g) − (10...
Modified expansion rates in the early Universe prior to big bang nucleosynthesis are common modified gravity theories, and can have a significant impact on generation of dark matter, matter-antimatter asymmetry, primordial black holes gravitational wave (PGW) spectrum. Here we study PGW spectrum cosmology. In particular, consider scalar-tensor extradimensional scenarios, investigating detection prospects current future GW observatories. For case, could be potentially observed by laser...
We propose a novel way of probing high scale Dirac leptogenesis, viable alternative to canonical leptogenesis scenario where the total lepton number is conserved, keeping light standard model (SM) neutrinos purely Dirac. The simplest possible seesaw mechanism for generating involve heavy singlet fermions and scalar. In addition unbroken global number, discrete $Z_2$ symmetry imposed forbid direct coupling between right left chiral parts neutrino. Generating neutrino mass requires scalar...
We study the freeze-in production of vector dark matter (DM) in a classically scale invariant theory, where Standard Model (SM) is augmented with an abelian $U(1)_X$ gauge symmetry that spontaneously broken due to non-zero vacuum expectation value (VEV) scalar charged under $U(1)_X$. Generating SM Higgs mass at 1-loop level, it leaves only two parameters sector, namely, DM $m_X$ and coupling $g_X$ as independent, supplement naturally light particle. show, for...
Abstract We revisit the growth of curvature perturbations in non-minimal curvaton scenario with a non-trivial field metric λ ( ϕ ) where is an inflaton field, and incorporate effect from non-uniform onset curvaton's oscillation terms axion-like potential. The plays central role enhancement perturbation δχ, serving as effective friction term which can be either positive or negative, depending on first derivative , . Our analysis reveals that δχ undergoes superhorizon when condition η eff ≡ -2...
We investigate the reach of future gravitational wave (GW) detectors in probing inflaton couplings with visible sector particles that can either be bosonic or fermionic nature. Assuming reheating takes place through perturbative quantum production from vacuum presence classical background field, we find spectral energy density primordial GW generated during inflation becomes sensitive to inflaton-matter coupling. conclude, obeying bounds Big Bang Nucleosysthesis and Cosmic Microwave...
Abstract We consider an inflationary kinetic function with integrable pole that is traversed during inflation. This scenario leads to enhanced spectra of primordial scalar inhomogeneities detectable signals: formation black holes (that could explain Dark Matter) and scalar-induced gravitational waves reproduce the recent Pulsar Timing Array observation, or predict signals in future detectors such as LISA ET). Spectral signatures depend on whether inflaton mass dimension at above below 2....
Positrons beam dump experiments have unique features to search for very narrow resonances coupled superweakly ${e}^{+}{e}^{\ensuremath{-}}$ pairs. Due the continued loss of energy from soft photon bremsstrahlung, in first few radiation lengths a positron can continuously scan resonant production new via ${e}^{+}$ annihilation off an atomic ${e}^{\ensuremath{-}}$ target. In case dark ${A}^{\ensuremath{'}}$ kinetically mixed with photon, this mode is order electromagnetic coupling...
Motivated by the stringy effects modifying local kinetic term of an Abelian Higgs field Gaussian term, we show that does not possess any instability; Yukawa coupling between scalar and fermion, gauge coupling, self interaction yields exponentially suppressed running at high energies, showing such class theory never suffers from vacuum instability. We briefly discuss its implications for early Universe cosmology.
In this paper we will show an ultraviolet-infrared connection for ghost-free infinite derivative field theories where the Lagrangians are made up of exponentials entire functions. particular, $N$-point amplitudes a new scale emerges in infrared from ultraviolet, i.e., ${M}_{\mathrm{eff}}\ensuremath{\sim}{M}_{s}/{N}^{\ensuremath{\alpha}}$, ${M}_{s}$ is fundamental beyond Standard Model and $\ensuremath{\alpha}>0$ depends on specific choice function whether consider zero or nonzero external...
A bstract We discuss the damping of inflationary gravitational waves (GW) that re-enter horizon before or during an epoch, where energy budget universe is dominated by unstable right handed neutrino (RHN), whose out equilibrium decay releases entropy. Starting from minimal Standard Model extension, motivated observed mass scale, with nothing more than 3 RHN for Seesaw mechanism, we conditions high scale leptogenesis assuming a thermal initial population RHN. further address associated...
Motivated by the recently reported measurement of $W$ boson mass $M_W = 80.4335 \pm 0.0094$ GeV CDF collaboration, we propose a type III seesaw extension minimal supersymmetric standard model (MSSM) which also includes an R-parity violating term. Without taking potential SUSY radiative corrections into account, show that $M_W$ and LEP $\rho$ parameter can be simultaneously accommodated at $2 \sigma$ level. A long-lived gravitino in few range is unique viable dark matter candidate this framework.
We explore the possibility of probing freeze-in dark matter (DM) produced via right-handed neutrino (RHN) portal using RHN search experiments. focus on a simplified framework minimally-extended type-I seesaw model consisting only four free parameters, namely mass, fermionic DM Yukawa coupling between and RHN, real singlet scalar mass. consider two cases for production either decay thermal or scattering bath particles mediated by RHN. In both cases, we show that sub-TeV scale masses, allowed...
We describe the challenges and pathways when probing inflaton as dark matter with stochastic gravitational waves (GWs) signal generated during (p)reheating. Such scenarios are of utmost interest no other interaction between visible sectors is present, therefore having detectability prospects. consider remnant energy in coherently oscillating inflaton's zeroth mode to contribute observed relic density Universe. To fully capture nonlinear dynamics effects backreactions oscillation, we resort...