L. Cremaldi
A5105274323- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Particle Detector Development and Performance
- Neutrino Physics Research
- Dark Matter and Cosmic Phenomena
- Particle Accelerators and Free-Electron Lasers
- Atomic and Subatomic Physics Research
- Computational Physics and Python Applications
- Medical Imaging Techniques and Applications
- Superconducting Materials and Applications
- Radiation Detection and Scintillator Technologies
- Black Holes and Theoretical Physics
- Cosmology and Gravitation Theories
- Astrophysics and Cosmic Phenomena
- Particle accelerators and beam dynamics
- Nuclear physics research studies
- Muon and positron interactions and applications
- Nuclear Physics and Applications
- Distributed and Parallel Computing Systems
- Advanced Data Storage Technologies
- CCD and CMOS Imaging Sensors
- Parallel Computing and Optimization Techniques
- Acoustic Wave Resonator Technologies
- Nuclear reactor physics and engineering
University of Mississippi
2016-2025
A. Alikhanyan National Laboratory
2022-2024
European Organization for Nuclear Research
2012-2024
University of Antwerp
2023-2024
Institute of High Energy Physics
2022-2024
Vrije Universiteit Brussel
2023-2024
Laboratoire d’Annecy de Physique des Particules
2002-2018
University of the Basque Country
2018
Istituto Nazionale di Fisica Nucleare, Sezione di Bari
2018
Institut National de Physique Nucléaire et de Physique des Particules
2018
We search for the rare decay <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:msup><a:mi>B</a:mi><a:mo>+</a:mo></a:msup><a:mo stretchy="false">→</a:mo><a:msup><a:mi>K</a:mi><a:mo>+</a:mo></a:msup><a:mi>ν</a:mi><a:mover accent="true"><a:mi>ν</a:mi><a:mo stretchy="false">¯</a:mo></a:mover></a:math> in a <f:math xmlns:f="http://www.w3.org/1998/Math/MathML" display="inline"><f:mn>362</f:mn><f:mtext> </f:mtext><f:mtext>...
The status of the research on muon colliders is discussed and plans are outlined for future theoretical experimental studies. Besides continued work parameters a 3-4 0.5 TeV center-of-mass (CoM) energy collider, many studies now concentrating machine near 0.1 that could be factory s-channel production Higgs particles. We discuss various components in such colliders, starting from proton accelerator needed to generate pions heavy-Z target proceeding through phase rotation decay ($\pi \to \mu...
From a sample of 1172 +/- 61 D(+)-->pi(-)pi(+)pi(+) decays, we find gamma(D(+)-->pi(-)pi(+)pi(+))/gamma(D(+)-->K-pi(+)pi(+)) = 0.0311 0.0018(+0.0016)(-0.0026). Using coherent amplitude analysis to fit the Dalitz plot these strong evidence that scalar resonance mass 478(+24)(-23) 17 MeV/c(2) and width 324(+42)(-40) 21 accounts for approximately half all decays.
We present a search for the direct production of light pseudoscalar decaying into two photons with Belle II detector at SuperKEKB collider. process e^{+}e^{-}→γa, a→γγ in mass range 0.2<m_{a}<9.7 GeV/c^{2} using data corresponding to an integrated luminosity (445±3) pb^{-1}. Light pseudoscalars interacting predominantly standard model gauge bosons (so-called axionlike particles or ALPs) are frequently postulated extensions model. find no evidence ALPs and set 95% confidence level upper...
We describe the status of our effort to realize a first neutrino factory and progress made in understanding problems associated with collection cooling muons towards that end. summarize physics can be done factories as well intense cold beams muons. The potential muon colliders is reviewed, both Higgs Factories compact high energy lepton colliders. timescale research development reviewed latest designs channels including promise ring coolers achieving longitudinal transverse simultaneously....
From a sample of 848+/-44 D(+)(s)-->pi(-)pi(+)pi(+) decays, we find gamma(D(+)(s)-->pi(-)pi(+)pi(+))/gamma(D(+)(s)-->straight phipi(+)) = 0.245+/-0.028(+0.019)(-0.012). Using Dalitz plot analysis this three body decay, significant contributions from the channels rho(0)(770)pi(+), rho(0)(1450)pi(+), f(0)(980)pi(+), f(2)(1270)pi(+), and f(0)(1370)pi(+). We also present values obtained for masses widths resonances f(0)(980) f(0)(1370).
We present the first direct measurements of pion valence-quark momentum distribution which is related to square light-cone wave function. The were carried out using data on diffractive dissociation $500\mathrm{GeV}/c$ ${\ensuremath{\pi}}^{\ensuremath{-}}$ into dijets from a platinum target at Fermilab experiment E791. results show that $|q\overline{q}〉$ asymptotic function describes well for ${Q}^{2}\ensuremath{\sim}10(\mathrm{GeV}/c{)}^{2}$ or more. also measured transverse dijets.
We present an analysis of the exclusive semileptonic decay mode ${D}^{0}$\ensuremath{\rightarrow}${K}^{\mathrm{\ensuremath{-}}}$${e}^{+}$${\ensuremath{\nu}}_{e}$. have measured ratio rates .11(syst), which corresponds to a ${D}^{0}$\ensuremath{\rightarrow}${K}^{\mathrm{\ensuremath{-}}}$${e}^{+}$${\ensuremath{\nu}}_{e}$ branching fraction (3.8\ifmmode\pm\else\textpm\fi{}0.5\ifmmode\pm\else\textpm\fi{}0.6)%. Combining our result with measurement ${D}^{0}$ lifetime, we find...
We report on the test beam results and calibration methods using high energy electrons, pions muons with CMS forward calorimeter (HF). The HF covers a large pseudorapidity region ( $3\leq|\eta|\leq5$ ), is essential for number of physics channels missing transverse energy. It also expected to play prominent role in measurement tagging jets weak boson fusion Higgs production. based steel absorber embedded fused-silica-core optical fibers where Cherenkov radiation forms basis signal...
We present a measurement of the τ-lepton mass using sample about 175 million e+e−→τ+τ− events collected with Belle II detector at SuperKEKB e+e− collider center-of-mass energy 10.579 GeV. This corresponds to an integrated luminosity 190 fb−1. use kinematic edge τ pseudomass distribution in decay τ−→π−π+π−ντ and measure be 1777.09±0.08±0.11 MeV/c2, where first uncertainty is statistical second systematic. result most precise date.Received 31 May 2023Accepted 13 July...
We determine the Cabibbo-Kobayashi-Maskawa matrix-element magnitude |Vcb| using B¯0→D*+ℓ−ν¯ℓ decays reconstructed in 189 fb−1 of collision data collected by Belle II experiment, located at SuperKEKB e+e− collider. Partial decay rates are reported as functions recoil parameter w and three angles separately for electron muon final states. obtain Boyd-Grinstein-Lebed Caprini-Lellouch-Neubert parametrizations, find |Vcb|BGL=(40.57±0.31±0.95±0.58)×10−3 |Vcb|CLN=(40.13±0.27±0.93±0.58)×10−3 with...
We measure the tau-to-light-lepton ratio of inclusive <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mi>B</a:mi></a:math>-meson branching fractions <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:mrow><c:mrow><c:mi>R</c:mi><c:mo stretchy="false">(</c:mo><c:msub><c:mrow><c:mi>X</c:mi></c:mrow><c:mrow><c:mi>τ</c:mi><c:mo>/</c:mo><c:mo>ℓ</c:mo></c:mrow></c:msub><c:mo stretchy="false">)</c:mo></c:mrow><c:mo>≡</c:mo><c:mspace...
We have studied the diffractive dissociation into dijets of 500 GeV/c pions scattering coherently from carbon and platinum targets. Extrapolating to asymptotically high energies (where t(min)-->0), we find that when per-nucleus cross section for this process is parametrized as sigma = sigma0Aalpha, alpha has values near 1.6, exact result depending on jet transverse momentum. These are in agreement with those predicted by theoretical calculations color-transparency.
The decay ${D}^{+}\ensuremath{\rightarrow}{K}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}{e}^{+}{\ensuremath{\nu}}_{e}$ has been studied in the Fermilab photoproduction experiment E691. ratio of branching ratios, $\frac{B({D}^{+}\ensuremath{\rightarrow}{\overline{K}}^{*0}{e}^{+}{\ensuremath{\nu}}_{e})}{B({D}^{+}\ensuremath{\rightarrow}{K}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{+})}$, is found to be 0.49\ifmmode\pm\else\textpm\fi{}0.04 \ifmmode\pm\else\textpm\fi{}0.05,...
Abstract From April to July 2018, a data sample at the peak energy of resonance was collected with Belle II detector SuperKEKB electron-positron collider. This is first experiment. Using Bhabha and digamma events, we measure integrated luminosity be ( , where uncertainty statistical second systematic. work provides basis for future measurements II.
We present measurements of the first to fourth moments lepton mass squared q2 B→Xcℓ¯νℓ decays for ℓ=e, μ and with Xc a hadronic system containing charm quark. These results use sample electron-positron collisions at Υ(4S) resonance corresponding 62.8 fb−1 integrated luminosity collected by Belle II 2 experiment in 2019 2020. To identify reconstruct q2, one B mesons from an Υ(4S)→B¯B decay is fully reconstructed mode using multivariate tagging algorithm. report raw central q2>1.5 GeV2/c4 up...
The ratio of branching fractions $R(D^{*}) = \mathcal{B}(\overline{B} \rightarrow D^{*} \tau^{-} \overline{\nu}_{\tau})$/$\mathcal{B} (\overline{B} \ell^{-} \overline{\nu}_{\ell})$, where $\ell$ is an electron or muon, measured using a Belle~II data sample with integrated luminosity $189~\mathrm{fb}^{-1}$ at the SuperKEKB asymmetric-energy $e^{+} e^{-}$ collider. Data collected $\Upsilon(\mathrm{4S})$ resonance, and one $B$ meson in $\Upsilon(\mathrm{4S})\rightarrow B\overline{B}$ decay...
We measure forward cross sections for production of ${D}^{+}$, ${D}^{0}$, ${D}_{s}$, ${D}^{*+}$, and ${\ensuremath{\Lambda}}_{c}$ in collisions ${\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}}$, ${K}^{\ifmmode\pm\else\textpm\fi{}}$, $p$ on a nuclear target. Production induced by different beam particles is found to be the same within statistics. Strange baryonic final states are seen contribute appreciably total charm section, which our measurements indicate larger than but consistent with...
A leading charm meson is one with longitudinal momentum fraction, xF>0, whose light quark (or antiquark) of the same type as quarks in beam particles. We report on production asymmetry, A=[σ(leading-σ(nonleading)]/[σ(leading)+σ(nonleading)] a function xF. The data consist 1500 fully reconstructed D± and D*± decays Fermilab experiment E 769. find significant asymmetry for not expected perturbative quantum chromodynamics.Received 22 October...
Extensive measurements have been made with pions, electrons and muons on four production wedges of the compact muon solenoid (CMS) hadron barrel (HB) calorimeter in H2 beam line at CERN particle momenta varying from 20 to 300 GeV/c. The time structure events was measured full chain preproduction front-end electronics running 34 MHz. Moving-wire radioactive source data were also collected for all scintillator layers HB. energy dependent slewing effect tuned optimal performance.
We search for the rare decay $B^{+}\rightarrow K^{+}ν\barν$ in a $362\ \rm{fb}^{-1}$ sample of electron-positron collisions at $Υ(4S)$ resonance collected with Belle II detector SuperKEKB collider. use inclusive properties accompanying $B$ meson $Υ(4S) \to B\kern 0.18em\overline{\kern -0.18em B}{}$ events to suppress background from other decays signal candidate and light-quark pair production. validate measurement an auxiliary analysis based on conventional hadronic reconstruction meson....
Using the large hadroproduced charm sample collected in experiment E791 at Fermilab, we report first directly measured constraint on decay-width difference Delta Gamma for mass eigenstates of D0-D0bar system. We obtain our result from lifetime measurements decays D0 --> K-pi+ and K-K+, under assumption CP invariance, which implies that are same. The K-K+ (the CP-even final state is \tau_KK = 0.410 +/- 0.011 0.006 ps, (an equal mixture CP-odd states tau_Kpi 0.413 0.003 0.004 ps. 2(Gamma_KK -...