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Unmixing the Wilson line defect CFT. Part I. Spectrum and kinematics
No full textThis is the first of a series of two papers in which we study the one-dimensional defect CFT defined by insertions of local operators along a -BPS Wilson line in = 4 super Yang-Mills. In this first paper we focus on the kinematical implications of invariance under the superconformal algebra preserved by the line. We study correlation functions involving both protected and unprotected supermultiplets and derive the associated superconformal blocks, using two types of superspace for short and long representations. We also discuss the spectrum of defect theories defined by the Wilson line, focusing in particular on fundamental lines in the planar limit: in this case we provide a detailed analysis of the type and number of states both at weak 't Hooft coupling, via the free gauge theory description of the defect CFT, and at strong coupling, where there is a dual description via AdS/CFT. Focusing on the strongly-coupled regime, which will be subject to a detailed analysis using analytic bootstrap techniques in [1], we also develop a strategy that allows to explicitly build superconformal primary operators and their superconformal descendants in terms of the elementary fields in the AdS Lagrangian description. The explicit results will be used in [1] to address the problem of operators mixing at strong coupling. This paper and the companion [1] provide an extended version of the results presented in [2]
Precise QCD predictions for W-boson production in association with a charm jet
No full textThe production of a W-boson with a charm quark jet provides a highly sensitive probe of the strange quark distribution in the proton. Employing a novel flavour dressing procedure to define charm quark jets, we compute W+charm-jet production up to next-to-next-to-leading order (NNLO) in QCD. We study the perturbative stability of production cross sections with same-sign and opposite-sign charge combinations for the W boson and the charm jet. A detailed breakdown according to different partonic initial states allows us to identify particularly suitable observables for the study of the quark parton distributions of different flavours
Search for Periodic Time Variations of the Solar <math display="inline"><mrow><mmultiscripts><mrow><mi mathvariant="normal">B</mi></mrow><mprescripts/><none/><mrow><mn>8</mn></mrow></mmultiscripts></mrow></math> Neutrino Flux between 1996 and 2018 in Super-Kamiokande
No full textWe report a search for time variations of the solar B8 neutrino flux using 5804 live days of Super-Kamiokande data collected between May 31, 1996, and May 30, 2018. Super-Kamiokande measured the precise time of each solar neutrino interaction over 22 calendar years to search for solar neutrino flux modulations with unprecedented precision. Periodic modulations are searched for in a dataset comprising five-day interval solar neutrino flux measurements with a maximum likelihood method. We also applied the Lomb-Scargle method to this dataset to compare it with previous reports. The only significant modulation found is due to the elliptic orbit of the Earth around the Sun. The observed modulation is consistent with astronomical data: we measured an eccentricity of (1.53±0.35)%, and a perihelion shift of (-1.5±13.5) days
Study of azimuthal anisotropy of ϒ(1S) mesons in pPb collisions at <math altimg="si1.svg"><msqrt><mrow><msub><mrow><mi>s</mi></mrow><mrow><msub><mrow/><mrow><mi mathvariant="normal">NN</mi></mrow></msub></mrow></msub></mrow></msqrt></math> = 8.16 TeV
No full textThe azimuthal anisotropy of Image 1 mesons in high-multiplicity proton-lead collisions is studied using data collected by the CMS experiment at a nucleon-nucleon center-of-mass energy of 8.16TeV. The Image 1 mesons are reconstructed using their dimuon decay channel. The anisotropy is characterized by the second Fourier harmonic coefficients, found using a two-particle correlation technique, in which the Image 1 mesons are correlated with charged hadrons. A large pseudorapidity gap is used to suppress short-range correlations. Nonflow contamination from the dijet background is removed using a low-multiplicity subtraction method, and the results are presented as a function of Image 1 transverse momentum. The azimuthal anisotropies are smaller than those found for charmonia in proton-lead collisions at the same collision energy, but are consistent with values found for Image 1 mesons in lead-lead interactions at a nucleon-nucleon center-of-mass energy of 5.02 TeV
The upgrade of the CMS muon system for the High Luminosity LHC
No full textThe muon system of the CMS experiment is expected to upgrade all of its subdetectors forthe Phase-2 of the Large Hadron Collider (LHC) that will begin in 2029. The upgrade plans fordrift tubes (DTs), cathode strip chambers (CSCs) and resistive place chambers (RPCs) include a newelectronics for better performance in high background rate conditions and to sustain the largeradiation dose delivered by the high-luminosity LHC (HL-LHC). Two new RPC stations will also beinstalled to complement CSCs in the forward region 1.8 < |η| < 2.4, while three stations oftriple-GEM (gas electron multiplier) detectors will complement CSCs in the region 1.5 < |η| <2.4 and extend the CMS muon system coverage to the very forward pseudorapidity region 2.4 <|η| < 2.8. We present the goals and status of the CMS muon system upgrade including theperformance of the early Phase-2 upgrades demonstrated in Run 3 with proton-proton collisions, theperformance validation of the new detectors in test beams and the mass production status of thenew stations
SIDDHARTA-2 apparatus for kaonic atoms research on the DAΦNE collider
No full textSIDDHARTA-2 is a state-of-the-art experiment designed toperform measurements of kaonic atoms, which are exotic atomscomposed of a negatively charged kaon orbiting nucleus. These atomsconstitute an exceptional probe for investigating the stronginteraction in the non-perturbative regime involving strangeness.The experiment is installed at the DAΦNE electron-positroncollider of the INFN National Laboratory of Frascati (INFN-LNF) inItaly, aiming to perform the first-ever measurement of the2p → 1s X-ray transitions in kaonic Deuterium, a crucialstep towards determining the isospin-dependent antikaon-nucleonscattering lengths. Based on the experience gained with the previousSIDDHARTA experiment, which performed the most precise measurementof the kaonic Hydrogen 2p → 1s X-ray transitions, thepresent apparatus has been upgraded with innovative X-Ray SiliconDrift Detectors (SDDs), distributed around a cryogenic gaseoustarget placed in a vacuum chamber at a short distance above theinteraction region of the collider, two new veto systems and acharged kaon detector. The current work presents a comprehensivedescription of the SIDDHARTA-2 setup, including the optimization ofits various components during the commissioning phase of thecollider
Note Illustrative della Carta geologica d'Italia alla scala 1:50.000 F. 217 Neviano degli Arduini, Servizio Geologico d'Italia - ISPRA
No full text<p>Note illustrative redatte per il Foglio geologico n. 217 Neviano degli Arduini della Carta Geologica d'Italia alla scala 1:50.000. 112 pp.</p>
Impact of beam far side-lobe knowledge in the presence of foregrounds for LiteBIRD
No full textWe present a study of the impact of a beam far side-lobe lack of knowledge on the measurement of the Cosmic Microwave Background B-mode signal at large scale. Beam far side-lobes induce a mismatch in the transfer function of Galactic foregrounds between the dipole and higher multipoles which degrads the performances of component separation methods. This leadsto foreground residuals in the CMB map. It is expected to be one of the main source of systematic effects in future CMB polarization observations. Thus, it becomes crucial for all-sky survey missions to take into account the interplays between beam systematic effects and all the data analysis steps. LiteBIRD is the ISAS/JAXA second strategic large-class satellite mission and is dedicated to target the measurement of CMB primordial B modes by reaching a sensitivity on the tensor-to-scalar ratio r of σ(r) ≤ 10 assuming r = 0. The primary goal of this paper is to provide the methodology and develop the framework to carry out the end-to-end study of beam far side-lobe effects for a space-borne CMB experiment. We introduce uncertainties in the beam model, and propagate the beam effects through all the steps of the analysis pipeline, most importantly including component separation, up to the cosmological results in the form of a bias δr. As a demonstration of our framework, we derive requirements on the calibration and modeling for the LiteBIRD's beams under given assumptions on design, simulation, component separation method and allocated error budget. In particular, we assume a parametric method of component separation with no mitigation of the far side-lobes effect at any stage of the analysis pipeline.We show that δr is mostly due to the integrated fractional power difference between the estimated beams and the true beams in the far side-lobes region, with little dependence on the actual shape of the beams, for low enough δr.Under our set of assumptions, in particular considering the specific foreground cleaning method we used, we find that the integrated fractional power in the far side-lobes should be known at the level of ∼ 10, to achieve the required limit on the bias δr < 1.9 × 10.The framework and tools developed for this study can be easily adapted to provide requirements under different design, data analysis frameworks and for other future space-borne experiments, such as PICO or CMB-Bharat. We further discuss the limitations of this framework and potential extensions to circumvent them
Measurements of Born cross sections for <math display="inline"><mrow><msup><mrow><mi>e</mi></mrow><mrow><mo>+</mo></mrow></msup><msup><mrow><mi>e</mi></mrow><mrow><mo>-</mo></mrow></msup><mo stretchy="false">→</mo><msubsup><mrow><mi mathvariant="normal">Λ</mi></mrow><mrow><mi>c</mi></mrow><mrow><mo>+</mo></mrow></msubsup><msub><mrow><mover accent="true"><mrow><mi mathvariant="normal">Λ</mi></mrow><mrow><mo stretchy="false">¯</mo></mrow></mover></mrow><mrow><mi>c</mi></mrow></msub><mo stretchy="false">(</mo><mn>2595</mn><msup><mrow><mo stretchy="false">)</mo></mrow><mrow><mo>-</mo></mrow></msup><mo>+</mo><mi mathvariant="normal">c</mi><mo>.</mo><mi mathvariant="normal">c</mi><mo>.</mo></mrow></math> and <math display="inline"><mrow><msup><mrow><mi>e</mi></mrow><mrow><mo>+</mo></mrow></msup><msup><mrow><mi>e</mi></mrow><mrow><mo>-</mo></mrow></msup><mo stretchy="false">→</mo><msubsup><mrow><mi mathvariant="normal">Λ</mi></mrow><mrow><mi>c</mi></mrow><mrow><mo>+</mo></mrow></msubsup><msub><mrow><mover accent="true"><mrow><mi mathvariant="normal">Λ</mi></mrow><mrow><mo stretchy="false">¯</mo></mrow></mover></mrow><mrow><mi>c</mi></mrow></msub><mo stretchy="false">(</mo><mn>2625</mn><msup><mrow><mo stretchy="false">)</mo></mrow><mrow><mo>-</mo></mrow></msup><mo>+</mo><mi mathvariant="normal">c</mi><mo>.</mo><mi mathvariant="normal">c</mi><mo>.</mo></mrow></math> at <math display="inline"><mrow><msqrt><mrow><mi>s</mi></mrow></msqrt><mo>=</mo><mn>4918.0</mn></mrow></math> and 4950.9 MeV
No full textUsing e+e- collision data collected with the BESIII detector operating at the BEPCII collider, the Born cross sections of e+e-→Λc+Λ¯c(2595)-+c.c. and e+e-→Λc+Λ¯c(2625)-+c.c. are measured for the first time at center-of-mass energies of s=4918.0 and 4950.9 MeV. Nonzero cross sections are observed very close to the production threshold. The measured Born cross sections of e+e-→Λc+Λ¯c(2625)-+c.c. are about 2–3 times greater than those of e+e-→Λc+Λ¯c(2595)-+c.c., providing the similar behavior as semileptonic decays of Λb0, but different behavior from that in the hadronic decays of Λb0. The Born cross sections are 15.6±3.1±0.9 pb and 29.4±3.7±2.7 pb for e+e-→Λc+Λ¯c(2595)-+c.c., and are 43.4±4.0±4.1 pb and 76.8±6.5±4.2 pb for e+e-→Λc+Λ¯c(2625)-+c.c. at s=4918.0 and 4950.9 MeV, respectively. Based on the polar angle distributions of the Λ¯c(2625)- and Λc(2625)+, the form-factor ratios |GE|2+3|GM|2/|GC| are determined for e+e-→Λc+Λ¯c(2625)-+c.c. for the first time, which are 5.95±4.07±0.15 and 0.94±0.32±0.02 at s=4918.0 and 4950.9 MeV, respectively. All of these first uncertainties are statistical and second systematic
Banca dati geologica F. 608 Caccamo scala 1:25.000
Get PDF<p>Banca Dati alla scala 1:25.000 della Carta Geologica prodotta nell'ambito del Progetto CARG in formato GeoPackage. I layer presenti si riferiscono alle Unità cartografabili geologiche, agli Elementi geomorfologici e alle Risorse e Prospezioni. Gli strati informativi sono rappresentati in accordo con la simbologia prevista dalla normativa del Progetto CARG.</p>