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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
A search for scalar and vector leptoquarks coupling to first generation fermions is performed using the e(+) p and e(-) p scattering data collected by the H1 experiment between 1994 and 2000. The data correspond to a total integrated luminosity of 117 pb(-1). No evidence for the direct or indirect production of such particles is found in data samples with a large transverse momentum final state el
Using the deep inelastic e(+) p and e(-) p charged and neutral current scattering cross sections previously published, a combined electroweak and QCD analysis is performed to determine electroweak parameters accounting for their correlation with parton distributions. The data used have been collected by the HI experiment in 1994-2000 and correspond to an integrated luminosity of 117.2 pb(-1). A me
The cross section for the diffractive deep-inelastic scattering process ep -> eX(P) is measured, with the leading final state proton detected in the H1 Forward Proton Spectrometer. The data analysed cover the range x(P) < 0.1 in fractional proton longitudinal momentum loss, 0.08 < vertical bar t vertical bar < 0.5 GeV-2 in squared four-momentum transfer at the proton vertex, 2 < Q(2) < 50 GeV2 in
Processes leading to a final state with at least two high transverse momentum leptons (electrons or muons) are studied using the full e(+/-) p data sample collected by the H1 experiment at HERA. The data correspond to an integrated luminosity of 463 pb(-1). Di-lepton and tri-lepton event classes are investigated. Cross sections of the production of e(+)e(-) and mu(+)mu(-) pairs are derived in a re
A search for excited electrons is performed using the full e(+/-) p data sample collected by the HI experiment at HERA, corresponding to a total luminosity of 475 pb(-1). The electroweak decays of excited electrons e* -> e gamma, e* -> eZ and e* -> vW with subsequent hadronic or leptonic decays of the W and Z bosons are considered. No evidence for excited electron production is found. Mass depende
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
The diffractive photoproduction of rho mesons, ep -> e rho Y, with large momentum transfer squared at the proton vertex, vertical bar t vertical bar, is studied with the H1 detector at HERA using an integrated luminosity of 20.1 pb(-1). The photon-proton centre of mass energy spans the range 75 < W < 95 GeV, the photon virtuality is restricted to Q(2) < 0.01 GeV2 and the mass My of the proton remn
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
() Department of Construction Sciences Solid Mechanics ISRN LUTFD2/TFHF–10/5160-SE(1-34) GPU parallelization of crystal plasticity FE analyses Master Thesis by Per Johansson SUPERVISOR HÅKAN HALLBERG AND YLVA MELLBIN, DIV. OF SOLID MECHANICS EXAMINER PROF. MATTI RISTINMAA, DIV. OF SOLID MECHANICS Copyright c© 2011 by Div. of Solid Mechanics and Per Johansson Printed by Media-Tryck, Lund ,Sweden Fo
https://www.solid.lth.se/fileadmin/hallfasthetslara/utbildning/examensarbete/TFHF5160.pdf - 2026-06-27
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
untitled \\jciprod01\productn\H\HLI\55-1\HLI105.txt unknown Seq: 1 29-JAN-14 10:15 Volume 55, Number 1, Winter 2014 Rule of Law in Afghanistan: Enabling a Constitutional Framework for Local Accountability Carol Wang* Rule of law practitioners have defined rule of law as a way to achieve several objectives. Three com- monly cited objectives are that rule of law should: 1. hold the governing powers
https://rwi.lu.se/wp-content/uploads/2024/11/Carol-Wang.pdf - 2026-06-28
Master’s Dissertation Engineering Acoustics ALI ALKHUDRI Report TV BA -5053 A LI A LK H U D RI A N IN V ESTIG A TIO N O N PV D F PIEZO ELEC TR IC ELEM EN TS A N D LIN EA R A R R A Y TR A N SD U C ER S AN INVESTIGATION ON PVDF PIEZOELECTRIC ELEMENTS AND LINEAR ARRAY TRANSDUCERS TVBA-5053HO.indd 1TVBA-5053HO.indd 1 2017-06-22 18:39:572017-06-22 18:39:57 DEPARTMENT OF CONSTRUCTION SCIENCES DIVISION O
https://www.akustik.lth.se/fileadmin/tekniskakustik/publications/tvba5000/webTVBA5053.pdf - 2026-06-27
Clausal Ellipsis and Case (Mis)Matching in Icelandic Jim Wood,1 Matthew Barros,1 Einar Freyr Sigurðsson2 1Yale University and 2University of Pennsylvania Abstract In this paper, we take a detailed look at clausal ellipsis in Icelandic, a hitherto understudied phenomenon. We focus on case-matching facts that seem to suggest two things. First, robust case-matching effects suggest that clausal ellips
https://projekt.ht.lu.se/fileadmin/_migrated/content_uploads/3._Wood-Barros-Sigurdsson_01.pdf - 2026-06-27
