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Differential photoproduction cross sections are measured for events containing D-*+/- mesons. The data were taken with the H1 detector at the ep collider HERA and correspond to an integrated luminosity of 51.1 pb(-1). The kinematic region covers small photon virtualities Q(2) < 0.01 GeV2 and photon-proton centre-of-mass energies of 171 < W gamma(Cep) < 256 GeV. The details of the heavy quark produ
A search for a narrow baryonic resonance decaying to K(s)(0)p or K-s(0)(p) over bar is carried out in deep inelastic ep scattering with the H1 detector at HERA. ss Such a resonance could be a strange pentaquark Theta(+), evidence for which has been reported by several experiments. The K(s)(0)p and K-s(0)(p) over bar invariant ss mass distributions presented here do not show any significant peak in
A search for the single production of doubly-charged Higgs bosons H-+/-+/- in ep collisions is presented. The signal is searched for via the Higgs decays into a high mass pair of same charge leptons, one of them being an electron. The analysis uses up to 118 pb(-1) of ep data collected by the H1 experiment at HERA. No evidence for doubly-charged Higgs production is observed and mass dependent uppe
Measurements are presented of inclusive charm and beauty cross sections in e(+)p collisions at HERA for values of photon virtuality 12 <= Q(2) = 60 GeV2 and of the Bjorken scaling variable 0.0002 <= x <= 0.005. The fractions of events containing charm and beauty quarks are determined using a method based on the impact parameter, in the transverse plane, of tracks to the primary vertex, as measured
The production of tau leptons in ep collisions is investigated using data recorded by the H1 detector at HERA in the period 1994-2000. Tau leptons are identified by detecting their decay products, using leptonic and hadronic decay modes. The cross section for the production of tau lepton pairs is measured for the first time at HERA. Furthermore, a search for events with an energetic isolated tau l
A measurement of charm and beauty dijet photoproduction cross sections at the ep collider HERA is presented. Events are selected with two or more jets of transverse momentum Pt > 11(8) GeV in the central range of pseudo-rapidity -0.9
Inclusive jet production is studied in neutral current deep-inelastic positron-proton scattering at large four momentum transfer squared Q(2) > 150 GeV2 with the H1 detector at HERA. Single and double differential inclusive jet cross sections are measured as a function of Q(2) and of the transverse energy E-T of the jets in the Breit frame. The measurements are found to be well described by calcul
Data taken with positrons of different longitudinal polarisation states in collision with unpolarised protons at HERA are used to measure the total cross sections of the charged current process, e(+) p -> nu X, for negative four-momentum transfer squared Q(2) > 400 GeV2 and inelasticity gamma < 0.9. Together with the corresponding cross section obtained from the previously published unpolarised da
A detailed analysis is presented of the diffractive deep-inelastic scattering process ep -> eXY, where Y is a proton or a low mass proton excitation carrying a fraction 1 - x(IP) > 0.95 of the incident proton longitudinal momentum and the squared four-momentum transfer at the proton vertex satisfies |t| < 1 GeV2. Using data taken by the H1 experiment, the cross section is measured for photon virtu
Measurements are presented of differential dijet cross sections in diffractive photoproduction (Q(2) < 0.01 GeV2) and deep-inelastic scattering processes (DIS, 4 < Q2 < 80 GeV2). The event topology is given by ep -> eXY, in which the system X, containing at least two jets, is separated from a leading low-mass baryonic system Y by a large rapidity gap. The dijet cross sections are compared with NLO
Deep-inelastic ep scattering data taken with the H1 detector at HERA and corresponding to an integrated luminosity of 106 pb(-1) are used to study the differential distributions of event shape variables. These include thrust, jet broadening, jet mass and the C-parameter. The four-momentum transfer Q is taken to be the relevant energy scale and ranges between 14 GeV and 200 GeV. The event shape dis
The production of neutral strange hadrons is investigated using deep-inelastic scattering events measured with the H1 detector at HERA. The measurements are made in the phase space defined by the negative four-momentum transfer squared of the photon 2 < Q(2) < 100 GeV2 and the inelasticity 0.1 < y < 0.6. The K-s(0) s and Lambda((Lambda) over bar) production cross sections and their ratios are dete
A first measurement is reported of the longitudinal proton structure function FL(X, Q(2)) at the ep collider HERA. It is based on inclusive deep inelastic e(+)p scattering cross section measurements with a positron beam energy of 27.5 GeV and proton beam energies of 920, 575 and 460 GeV. Employing the energy dependence of the cross section, FL is measured in a range of squared four-momentum transf
Three- and four-jet production is measured in deep-inelastic ep scattering at low x and Q(2) with the H1 detector using an integrated luminosity of 44.2 pb(-1). Several phase space regions are selected for the three-jet analysis in order to study the underlying parton dynamics from global topologies to the more restrictive regions of forward jets close to the proton direction. The measurements of
The process of charm quark fragmentation is studied using D (* +/-) meson production in deep-inelastic scattering as measured by the H1 detector at HERA. The parameters of fragmentation functions are extracted for QCD models based on leading order matrix elements and DGLAP or CCFM evolution of partons together with string fragmentation and particle decays. Additionally, they are determined for a n
Microsoft Word - Borell.doc Abstract—LTH:s policy för kvalitetsarbete kring grund- utbildningen placerar studenternas lärande i fokus, och anger att den pedagogiska utvecklingen ska bygga på en väl- informerad dialogprocess. Enkäten CEQ används sedan hösten 2003 i stor omfattning som dataunderlag i kvalitetsarbetet. Under de första fem åren har stora mängder data samlats in, men inte särskilt mång
https://www.lth.se/fileadmin/lth/genombrottet/konferens2008/J_Borell__K_Andersson__M_Alveteg__T_Roxa.pdf - 2026-06-09
Get a grip of your a guide to competence and career development Preface A company is no better than its collective competence. Your and your colleagues' knowledge, experience and ability to translate these competencies are therefore completely fundamental to Scania's success. At the same time, technological development is faster than ever. In order to be at the forefront, we need to constantly bui
Convergence analysis of Lie and Strang splitting for operator-valued differential Riccati equations CONVERGENCE ANALYSIS OF LIE AND STRANG SPLITTING FOR OPERATOR-VALUED DIFFERENTIAL RICCATI EQUATIONS∗ ESKIL HANSEN† , TONY STILLFJORD† , AND TEODOR ÅBERG† Abstract. Differential Riccati equations (DREs) are semilinear matrix- or operator-valued differential equations with quadratic non-linearities.
https://www.maths.lu.se/fileadmin/maths/personal_staff/Eskil_Hansen/Riccati_expsplitt.pdf - 2026-07-17
Yngre kan ha lika svårt för digital teknik som äldre – Vetenskap och Hälsa Hoppa till innehåll Vetenskap och hälsa Populärvetenskapligt om medicinsk forskning i Skåne Teman Podd Tidskrift Prenumerera Om webbplatsen Kontakt Sök Sök Yngre kan ha lika svårt för digital teknik som äldre 2025-09-26 Det är inte åldern i sig som påverkar attityden till digital teknik, utan andra faktorer som formar använ
https://www.vetenskaphalsa.se/yngre-kan-ha-lika-svart-for-digital-teknik-som-aldre/ - 2026-07-18
Centre for Mathematical Sciences Faculty of Science Centre for Mathematical Sciences Division of Mathematics and Numerical Analysis Course Analysis for MATA32/ÄMAA02 Algebra and Vector Ge- ometry, Autumn 2025 Course Information Lecturer: Anna-Maria Persson Teaching assistants: PhD students: Anna Rockstroh and Jimmy Kornelije Gunnarsson, student employees Chi Chen Wong, Urszula Jedrzejak Akash Arju
https://www.maths.lu.se/fileadmin/maths/Matematik_NF/Kursutvaerderingar/HT2025/MATA32A__MAA02HT2025.pdf - 2026-07-18
