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A novel MPGD-based Hadronic Calorimeter for Muon Collider experiments
Get PDFThe Multi-TeV Muon Collider is proposed as a promising tool for advancement in understanding the Standard Model within the European particle physics strategy. The Muon Collider physics program focuses on precise measure- ments in the Higgs boson sector and exploring new physics at the TeV scale. Achiev- ing these goals requires accurate full-event reconstruction, with the Particle Flow (PF) algorithm as a suitable approach. This algorithm utilizes information from tracking, calorimeter, and muon detectors for particle identification and momen- tum/energy measurements. The challenge lies in discriminating μμ collision prod- ucts from the intense beam-induced background (BIB) due to the unstable nature of muons. To address this, an innovative hadronic calorimeter (HCAL) based on Mi- cro Pattern Gas Detectors (MPGDs) is proposed. MPGDs offer robust technology for high radiation environments and high granularity for precise spatial measure- ments. Dedicated studies are needed to assess and optimize the performance of the MPGD-based HCAL, including developing prototypes as proof of concept. Monte Carlo simulations using Geant4 evaluate the HCAL’s response to incoming parti- cles, comparing digital and semi-digital readouts with energy resolution as the key metric. The simulated geometry is integrated into the Muon Collider software to analyze its impact on jet reconstruction amid the full apparatus and in the pres- ence of BIB. Validation involves testing a small-size calorimeter cell equipped with resistive MPGD technologies like MicroMegas, μRWELL, and RP-WELL
Proof-of-principle test for a charm baryon experiment at the LHC
Get PDFIn the research for physics within and beyond the Standard Model, electric and magnetic dipole moments have proven to be powerful probes. As of today, they haven’t been measured for the case of charm baryons due to their really short lifetime. A new experiment has been proposed at the insertion region 3 of the LHC during Run 3, featuring an innovative technique that will exploit the use of bent crystals. A first proof-of-principle test at the LHC is foreseen by the end of 2025. The goals of the test and the experimental challenges will be presented in this paper together with the physics program that exploits the unique forward acceptance of the future experiment
Looking for X17 at PADME
Get PDFThe ATOMKI collaboration has recently confirmed the existence
of the so-called “8Be anomaly” also in the decay via Internal Pair Creation (IPC)
of 4He and 12C. This anomaly can be seen as the creation and decay of a ∼ 17
MeV intermediate particle called X17. PADME Run III goal was to determine
the existence and nature (whether it is a vector or pseudo-scalar) of X17. The
PADME experiment, located at the Frascati National Laboratories of INFN, can
indeed generate X17 through positron annihilation with the electrons of a fixed thin diamond target. During Run II in 2020, PADME already collected data at a fixed center-of-mass energy of 20 MeV to search for a dark photon signal. On the contrary, the recently concluded Run III was performed at the center of mass energies around the expected mass value of X17, with the aim of observing an enhancement in the e+e− pairs produced. Indeed, by analyzing the finely scanned data acquired around √s = 17 MeV, it will be possible to clearly identify any significant increases in cross-section induced by the production of a particle not predicted by the Standard Model
A 64-channel ASIC for full waveform sampling with 200 MS/s for space-based cosmic-particles applications
Get PDFThis paper discusses the development of a 64-channel Application- Specific Integrated Circuit designed in a commercial 65 nm CMOS technology to readout a camera plane composed of Silicon Photo-Multipliers. The purpose of the readout chain is the observation of Extensive Air Showers by detecting the Cherenkov radiation which signal is produced by Ultra-High Energy Cosmic Rays and Cosmic Neutrinos. Each ASIC generates a hitmap sent to an FPGA to ana- lyze the pixel proximity. The stored data can be digitally converted on-chip if it is validated through this external checker. A single ASIC is formed by channels where 256 cells are connected to the output of the front-end electronics to obtain a full waveform sampling. An analog memory, a 12-bits Wilkinson Analog-to-Digital Converter and latches are placed into the cell unit working at 200 MHz clock. To derandomize the input signal, the array of cells is partitioned into segments of 32 cells each. The readout is realized using a serializer operating at 400 MHz in Double Data Rate. The ASIC is developed in the framework of the Extreme Universe Space Observatory - Super Pressure Balloon 2 mission, but it is also suitable for several other applications due to its configurability such as the partitioning and the resolu- tion in the range of 8-12 bits. In this way, the chip can save power and conversion time, depending on the requirements of the experiment
Energy threshold calibration of the GAPS experiment Si tracker readout electronics
Get PDFGAPS (General AntiParticle Spectrometer) is a stratospheric balloon experiment designed to detect low-energy cosmic ray antinuclei (< 0.25 GeV) as an indirect signature of dark matter. The experiment exploits an innovative particle identification approach based on the formation of an excited atom and its consequent de-excitation and decay. GAPS will provide unprecedented sensitivity to cosmic antideuterons, an antiproton spectrum in a hitherto unexplored energy range and high sensitivity to cosmic antihelium. The first flight is foreseen to take place from the McMurdo Station in Antarctica during the austral summer of 2024. The instrument is currently undergoing integration and calibration in anticipation of launch. In this paper, the latest tracker electronics energy threshold calibration results will be presented
The CYGNO experiment, a directional detector with optical readout for Dark Matter search
Get PDFThe CYGNO experiment employs a gaseous Time Projection Cham
ber (TPC) in conjunction with Gas Electron Multipliers (GEMs) for amplification and optical readout. This configuration holds the potential to achieve precise 3D tracking down to O(1 keV) energies. The primary objective of this novel technique is to enable direct directional measurements of Dark Matter within our Galaxy. We assess the performance of the largest prototype, LIME, at Laboratori Nazionali del Gran Sasso (LNGS), including stability, energy response and resolution, using radioactive X-ray sources and Monte Carlo simulations. These findings will guide the fine-tuning of the CYGNO 04 demonstrator
Double-beta decay of 104Ru
Get PDFIn this study we have carried out the calculations concerning the double-beta decay of 104Ru to 104Pd. The calculations utilize the microscopic interacting boson model (IBM-2) for the nuclear matrix elements, and exact Dirac wave functions with finite nuclear size and electron screening for phase space factors. From these results, the half-life estimates for two-neutrino and neutrinoless double beta decay can be obtained
JUNO Sensitivity to geoneutrinos
Get PDFGeoneutrinos are neutrinos generated from the decay of natural radioactive elements in the Earth. From these decays, the ratio between the number of neutrinos and the energy released (radiogenic heat) is well known. In order
to understand the different processes of the Earth, Bulk Silicate Earth models are formulated, providing expected abundances of radioactive elements and radiogenic heat. Therefore, by measuring geoneutrinos, the different BSE models can be tested. Additionally, the total amount of heat released from the surface of the Earth is coupled with the different dynamical processes. The total heat budget is composed of the cooling from the Earth’s formation and the radiogenic heat. Thus, geoneutrinos also give insight into dynamical processes. The Jiangmen Underground Neutrino
Observatory (JUNO) is a 20 kton Liquid Scintillator detector that will be able to measure geoneutrinos with high precision thanks to its great volume. It is expected to achieve 10% precision in just 6 years, improving upon current results from Borexino and KamLAND
On neutrino telescopes and their ability to infer astrophysical neutrino sources via the Glashow resonance
Get PDFUsing the Glashow resonance candidate event recently identified by IceCube, we infer the ultra-high energy astrophysical neutrino source. Since it can distinguish νe from νe, the Glashow resonance is a valuable probe to identify the source of astrophysical neutrinos. With the available experimental information we set a constraint on the νe fraction of astrophysical neutrinos and find that the
μ-damped pγ source is excluded at about 2σ confidence level and that there is a weak preference for the pp source. Next generation neutrino telescopes will be able to distinguish between ideal pp and pγ sources with a high significance assuming a single power-law neutrino spectrum