O. Erriquez
- Particle physics theoretical and experimental studies
- Dark Matter and Cosmic Phenomena
- Astrophysics and Cosmic Phenomena
- Quantum Chromodynamics and Particle Interactions
- Neutrino Physics Research
- High-Energy Particle Collisions Research
- Particle Detector Development and Performance
- Particle accelerators and beam dynamics
- Computational Physics and Python Applications
- Radiation Detection and Scintillator Technologies
- Black Holes and Theoretical Physics
- Particle Accelerators and Free-Electron Lasers
- Atomic and Subatomic Physics Research
- Cosmology and Gravitation Theories
- Muon and positron interactions and applications
- Scientific Research and Discoveries
- Nuclear Physics and Applications
- Superconducting Materials and Applications
- Radio Astronomy Observations and Technology
- Pulsars and Gravitational Waves Research
- Gamma-ray bursts and supernovae
- Mechanical and Optical Resonators
- Medical Imaging Techniques and Applications
- Nuclear physics research studies
- Spacecraft and Cryogenic Technologies
Sapienza University of Rome
2002-2015
Istituto Nazionale di Fisica Nucleare, Sezione di Roma I
1990-2015
University of Bari Aldo Moro
1998-2014
Istituto Nazionale di Fisica Nucleare, Sezione di Bari
1996-2013
Istituto Nazionale di Fisica Nucleare, Sezione di Napoli
2013
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati
1993-2012
Karlsruhe Institute of Technology
2003-2005
Istituto Nazionale di Fisica Nucleare
2002-2004
University of L'Aquila
2003
Istituto Nazionale di Fisica Nucleare, Sezione di Lecce
2002
We present a measurement of the flux neutrino-induced upgoing muons (<Eν>∼ 100 GeV) using MACRO detector. The ratio number observed to expected events integrated over all zenith angles is 0.74 ±0.036 (stat) ±0.046 (systematic) ±0.13 (theoretical). distribution for −1.0≤cosθ≤−0.1 does not fit well with no oscillation expectation, giving maximum probability χ2 0.1%. acceptance detector has been extensively studied downgoing muons, independent analyses and Monte Carlo simulations. other...
The existence of a light dark force mediator has been tested with the KLOE detector at DAPHNE. This particle, called U, is searched for using decay chain phi-->etaU, eta-->pi+pi-pi0, U-->e+e-. No evidence found in 1.5 fb-1 data. resulting exclusion plot covers mass range 5
We have searched for a light vector boson U, the possible carrier of "dark force", with KLOE detector at DAΦNE e+e− collider, motivated by astrophysical evidence presence dark matter in Universe. Using collisions collected an integrated luminosity 239.3 pb−1, we look dimuon mass peak reaction e+e−→μ+μ−γ, corresponding to decay U→μ+μ−. find no U signal. set 90% CL upper limit mixing parameter squared between photon and 1.6×10−5 8.6×10−7 region 520<mU<980 MeV.
The angular distribution of upward-going muons produced by atmospheric neutrinos in the rock below MACRO detector show anomalies good agreement with two flavor neutrino-mu ==> neutrino-tau oscillations maximum mixing and Delta m**2 around 0.0024 eV**2. Exploiting dependence magnitude matter effect on oscillation channel, using a set 809 observed MACRO, we that neutrino-sterile is disfavored 99% C.L. respect to neutrino-tau.
The vertical underground muon intensity has been measured in the slant depth range 3200–7000 hg cm−2 (standard rock) with completed lower part of MACRO detector at Gran Sasso laboratory, using a large sample data. These observations are used to compute surface flux and primary ''all-nucleon'' spectrum. An analysis systematic uncertainties introduced by interaction models atmosphere propagation muons is presented. A comparison our results published data also presented.Received 3 April...
In this paper the design, construction and performance of lower part first supermodule MACRO detector is described.
Neutral kaon pairs produced in phi decays anti-symmetric entangled state can be exploited to search for violation of CPT symmetry and Lorentz invariance. We present an analysis the CP-violating process phi->K_S K_L->pi+pi-pi+pi- based on 1.7 fb-1 data collected by KLOE experiment at Frascati phi-factory DAFNE. The are used perform a measurement CPT-violating parameters Delta_amu neutral kaons contest Standard Model Extension framework. measured reference frame fixed stars are: Delta_ao =...
Using 5.33 × 106 single muons collected in 1.46 104 live hours by MACRO during the period 1991–1994, we have searched for a correlation between variations underground muon rate, Nμ, and seasonal temperature atmosphere. These correlations are found to be present with high statistical significance. Analysis of relatively complete December 1992–December 1994 subset data yields value coefficient, αT = (TNμ)(∂Nμ∂T) 0.83±0.13. total set gives consistent results. We compared this result hypothesis...
We report on the first measurement of flux upgoing muons resulting from interactions atmospheric neutrinos in rock below MACRO. The ratio observed to expected number events integrated over all nadir angles is 0.73 ± .09stat. .06sys. .12theor.. as a function angle presented and compared Monte Carlo expectations. At 90% confidence level, data are consistent with no neutrino oscillations or some possible oscillation hypothese parameters suggested by Kamiokande contained-event analysis.
We perform an indirect search for Weakly Interacting Massive Particles (WIMPs) using the MACRO detector to look neutrino-induced upward-going muons resulting from annihilation of WIMPs trapped in Sun and Earth. The is conducted various angular cones centered on Earth accommodate a range WIMP masses. No significant excess over background atmospheric neutrinos seen limits are placed muon fluxes These used constrain neutralino particle parameters supersymmetric theory, including those suggested...
We have analyzed 44.3M single muons collected by MACRO from 1991 through 2000 in 2145 live days of operation. searched for the solar diurnal, apparent sidereal, and pseudosidereal modulation underground muon rate computing hourly deviations 6 month averages. find evidence statistically significant modulations with diurnal sidereal periods. The amplitudes these are <0.1%, at limit detector statistics. is not significant. due to daily atmospheric temperature variations 20 km, altitude primary...