S. Cecchini
A5015255411- Astrophysics and Cosmic Phenomena
- Neutrino Physics Research
- Particle physics theoretical and experimental studies
- Dark Matter and Cosmic Phenomena
- Particle Detector Development and Performance
- Geometric Analysis and Curvature Flows
- Advanced Operator Algebra Research
- Solar and Space Plasma Dynamics
- Radio Astronomy Observations and Technology
- Advanced Topics in Algebra
- Cosmology and Gravitation Theories
- Advanced Differential Geometry Research
- Radiation Detection and Scintillator Technologies
- Pulsars and Gravitational Waves Research
- Particle accelerators and beam dynamics
- Spectral Theory in Mathematical Physics
- Geometry and complex manifolds
- Nonlinear Differential Equations Analysis
- Muon and positron interactions and applications
- Gamma-ray bursts and supernovae
- Astro and Planetary Science
- Numerical methods in inverse problems
- Stability and Controllability of Differential Equations
- High-Energy Particle Collisions Research
- Holomorphic and Operator Theory
Texas A&M University
2023-2024
University of Göttingen
2018-2024
Istituto Nazionale di Fisica Nucleare, Sezione di Bologna
2010-2023
Rice University
2023
University of Cambridge
2023
Columbia University
2023
University of Chicago
2023
Cornell University
2023
Yale University
2023
University of Warwick
2023
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.
We use the Dirac operator technique to establish sharp distance estimates for compact spin manifolds under lower bounds on scalar curvature in interior and mean of boundary.In situations we consider, thereby give refined answers questions metric inequalities recently proposed by Gromov.This includes optimal Riemannian bands long neck problem.In case over non-vanishing A-genus, a rigidity result stating that any band attaining predicted upper bound is isometric particular warped product some...
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...
The SLIM experiment was a large array of nuclear track detectors located at the Chacaltaya high altitude Laboratory (5230 m a.s.l.). detector in particular sensitive to Intermediate Mass Magnetic Monopoles, with masses 10^5 < M <10^{12} GeV. From analysis full exposed for more than 4 years flux upper limit 1.3 x 10^{-15} cm^{-2} s^{-1} sr^{-1} downgoing fast Monopoles established 90% C.L.
Abstract We develop index theory on compact Riemannian spin manifolds with boundary in the case when topological information is encoded by bundles which are supported away from boundary. As a first application, we establish “long neck principle” for n -manifold X , stating that if $${{\,\mathrm{scal}\,}}(X)\ge n(n-1)$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mspace /> <mml:mi>scal</mml:mi> </mml:mrow> <mml:mo>(</mml:mo> <mml:mi>X</mml:mi> <mml:mo>)</mml:mo>...
Let M be a closed smooth connected spin manifold of even dimension n , let g Riemannian metric regularity W^{1,p} p > on whose distributional scalar curvature in the sense Lee–LeFloch is bounded below by n(n-1) and f \colon (M,g) \to \mathbb{S}^n 1 -Lipschitz continuous (not necessarily smooth) map nonzero degree to unit -sphere. Then isometry. This generalizes result Llarull (1998) answers affirmative question Gromov (2019) his Four lectures . Our proof based spectral properties Dirac...
This proposal describes an experimental search for sterile neutrinos beyond the Standard Model with a new CERN-SPS neutrino beam. The experiment is based on two identical LAr-TPC's followed by magnetized spectrometers, observing electron and muon events at 1600 300 m from proton target. project will exploit ICARUS T600, moved LNGS to CERN "Far" position. An additional 1/4 of T600 detector be constructed located in "Near" Two spectrometers placed downstream LAr-TPC detectors greatly...
Abstract We prove a positive mass theorem for spin initial data sets $(M,g,k)$ that contain an asymptotically flat end and shield of dominant energy (a subset $M$ on which the scalar $\mu -|J|$ has lower bound). In similar vein, we show $\mathcal{E}$ violates (i.e., $\textrm{E} &lt; |\textrm{P}|$), there exists constant $R&gt;0$, depending only $\mathcal{E}$, such any set containing must violate hypotheses Witten’s proof in $R$-neighborhood $\mathcal{E}$. This implies with arbitrary...
A negative search using 1/12 of the eventual MACRO detector has yielded nuclearite flux limits 1.1\ifmmode\times\else\texttimes\fi{}${10}^{\mathrm{\ensuremath{-}}14}$ ${\mathrm{cm}}^{\mathrm{\ensuremath{-}}2}$ ${\mathrm{sr}}^{\mathrm{\ensuremath{-}}1}$ ${\mathrm{s}}^{\mathrm{\ensuremath{-}}1}$ for ${10}^{\mathrm{\ensuremath{-}}10}$m0.1 g, and 5.5\ifmmode\times\else\texttimes\fi{}${10}^{\mathrm{\ensuremath{-}}15}$ m>0.1 g. We have modified formula De R\'ujula Glashow light yield...
We show that an enlargeable Riemannian metric on a (possibly nonspin) manifold cannot have uniformly positive scalar curvature. This extends well-known result of Gromov and Lawson to the nonspin setting. also prove every noncompact admits nonenlargeable metric. In proving first result, we use main recent paper by Schoen Yau minimal hypersurfaces obstruct curvature in arbitrary dimensions. More concretely, this study nonzero degree maps f from X product k-sphere with n-k dimensional torus,...
Abstract The ENUBET project is aimed at designing and experimentally demonstrating the concept of monitored neutrino beams. These novel beams are enhanced by an instrumented decay tunnel, whose detectors reconstruct large-angle charged leptons produced in tunnel give a direct estimate flux source. facilities thus ideal tool for high-precision cross-section measurements GeV scale because they offer superior control beam systematics with respect to existing facilities. In this paper, we...
view Abstract Citations (27) References (39) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Muon Astronomy with the MACRO Detector Ahlen, S. ; Ambrosio, M. Antolini, R. Auriemma, G. Baldini, A. Bam, B. Barbarino, Barish, Battistoni, Bellotti, Bemporad, C. Bernardini, P. Bilokon, H. Bisi, V. Bloise, Bussino, Cafagna, F. Calicchio, Campana, D. Carboni, Cecchini, Cei, Chiarella, Chiera, Cobis, Cormack, Corona, Coutu, Decataldo, Dekhissi, Demarzo, de Vincenzi,...
Tensions in several phenomenological models grew with experimental results on neutrino/antineutrino oscillations at Short-Baseline (SBL) and the recent, carefully recomputed, antineutrino fluxes from nuclear reactors. At a refurbished SBL CERN-PS facility an experiment aimed to address open issues has been proposed [1], based technology of imaging ultra-pure cryogenic Liquid Argon (LAr). Motivated by this scenario detailed study physics case was performed. We tackled specific we optimized...
A Dirac-type operator on a complete Riemannian manifold is of Callias-type if its square Schrödinger-type with potential uniformly positive outside compact set. We develop the theory operators twisted Hilbert [Formula: see text]-module bundles and prove an index theorem for such operators. As application, we derive obstruction to existence metrics scalar curvature noncompact spin manifolds in terms closed submanifolds codimension one. In particular, when text] manifold, show that cylinder...
A prototype for the instrumented decay tunnel of ENUBET was tested in 2018 at CERN East Area facility with charged particles up to 5 GeV. This detector is a longitudinal sampling calorimeter lateral scintillation light readout. The equipped by an additional "$t_0$-layer" timing and photon discrimination. performance this terms electron energy resolution, linearity, response muons hadron showers are presented paper compared simulation. $t_0$-layer studied both standalone mode using pion...
A search for slowly moving magnetic monopoles in the cosmic radiation was conducted from October 1989 to November 1991 using large liquid scintillator detector subsystem of first supermodule MACRO at Gran Sasso underground laboratory. The absence candidates established an upper limit on monopole flux 5.6×10−15 cm−2 sr−1 s−1 90% confidence level velocity range 10−4≲β<4×10−3. This result places a new constraint abundance trapped our solar system.Received 21 September...