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2 edition of Leading neutron physics at HERA using the forward neutron detector at ZEUS. found in the catalog.

Leading neutron physics at HERA using the forward neutron detector at ZEUS.

Thorsten Koop

# Leading neutron physics at HERA using the forward neutron detector at ZEUS.

## by Thorsten Koop

Published .
Written in English

Leading neutrons produced in high energy electron-proton collisions at a center-of-momentum energy of 318 GeV2 are studied with the Forward Neutron Detector of the ZEUS experiment at the HERA collider. The Forward Neutron Detector consists of the Forward Neutron Calorimeter and the newly implemented Forward Neutron Tracker. The detectors and their calibration are presented. The transverse momentum squared, p2T , distributions of leading neutrons in bins of xL, the fraction of the proton energy carried by the neutron, have been measured using the Forward Neutron Tracker. The measurements were made using data samples in deep inelastic scattering and photoproduction, corresponding to integrated luminosities of 21 pb-1 and 9.3 pb-1, respectively. The distributions are fitted with an exponential, and the slopes are presented as a function of xL. The results are compared to models of one pion exchange and to leading proton measurements. The xL distributions of the photoproduced neutrons are measured for different bins of t, the invariant momentum transfer squared. The (1 - xL) distributions satisfy a power law dN/dxL ∝ (1 - xL)a (t) with the powers a(t) lying on a linear trajectory in t: a(t) = 1.08 +/- 1.08+0.40-0.42 - (2.78 +/- 0.32+0.31-0.41 GeV-2)t. This result is consistent with that expected from pion exchange and with previous measurements. The neutron energy distributions are compared for different values of momentum transfer squared between the electron and the proton and the results are discussed in the context of models of absorption.

The Physical Object
Pagination141 leaves.
Number of Pages141
ID Numbers
Open LibraryOL20339448M
ISBN 100612918130

meter started recently for the Zeus detector at the HERA electron-proton collider soon to be commissioned at the DESY Laboratory in Hamburg. The picture shows the first mo­ dules of the forward calorimeter in place in front of the solenoid. dard Model, Heavy Flavours and CP Violation, and Detectors; with addi­ tional lectures on collider physics. Determination of the strong coupling constant $\alpha_s (m_Z)$ in next-to-next-to-leading order QCD using H1 jet cross section measurements (in session "Strong Interactions and Hadron Physics") Development of 50 cm Photo-Detectors for Hyper-Kamiokande (in session "Detector: R&D for Present and Future Facilities").

It includes an account of progress in the theory of strong interactions and of advances in neutrino physics. The book clearly develops the theoretical concepts from the electromagnetic and weak interactions of leptons and quarks to the strong interactions of quarks. Each chapter ends with problems, and hints to selected problems are provided at. Editors Stephen G. Steadman Room MIT 77 Massachusetts Ave Cambridge, MA USA E-mail: [email protected] George S. F. Stephans Room MIT 77 Massachusetts Ave.

The ICHEP is the vital platform for exchanging recent achievements and discussing future facilities in particle physics, astrophysics, and cosmology. The first conference was held at Rochester in Since then, the ICHEP has served as the core arena for leading experimentalists and theorists of the world to share exciting results and new ideas. The most non-trivial of the established microscopic theories of physics is QCD: the theory of the strong interaction. A critical link between theory and experiment is provided by the methods of perturbative QCD, notably the well-known factorization by:

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### Leading neutron physics at HERA using the forward neutron detector at ZEUS by Thorsten Koop Download PDF EPUB FB2

The production of energetic neutrons in ep collisions has been studied with the ZEUS detector at HERA. The neutron energy and distributions were measured with a forward neutron calorimeter and. The U.S. Department of Energy's Office of Scientific and Technical Information. Description; Chapters; Supplementary; The proceedings of DIS present the most updated status of deep inelastic scattering (DIS) physics.

Topics like structure function measurements and phenomenology, QCD studies in DIS and photoproduction, spin physics and diffractive interactions are reviewed in detail, with emphasis on those studies that push the test of QCD and the Standard.

Tracking Elements of the ZEUS Detector. Introduction. Both of the experiments planned for HERA, ZEUS and H1, have specialized tracking detectors in the forward direction because of the beam asymmetry mentioned previously.

At ZEUS, there are four separate tracking chambers. If the address matches an existing account you will receive an email with instructions to reset your password. Recently the ZEUS and HI collab- orations at HERA have installed forward neutron calorimeters (FNC) which provide additional experimental information.

In analogy to the hadronic reaction pp -+ nX, the pion exchange is expected to be the dominant mech- anism of the fast neutron production also at HERA Author: A.

Szczurek. The NOOK Book (eBook) of the Proceedings of the 31st International Conference on High Energy Physics ICHEP by S.

Bentvelsen, P. de Jong, J. Koch, E Due to COVID, orders may be delayed. Thank you for your patience. At HERA, the H1 and ZEUS experiments have searched for ED using the complete statistics corresponding to 16 () pb-1 in e− p (e+ p) scattering.

The interference of the G exchange with the SM ϒ and Z processes leads to an effective contact type interaction with a coupling G =λ/μ S 4, where the parameter λ depends on the details of the. The Table of Contents for the book is as follows: * VOLUME I * Foreword * Conference Organization * PLENARY SESSIONS * Pl Recent Results from the Super-Kamiokande * Recent Results from the Super-Kamiokande * Pl Recent Results on Neutrino Oscillations * Recent Results on Neutrino Oscillations * Pl Experimental Status of the Standard Model * Author: Alan Astbury, David Axen, Jacob Robinson.

Widely used in high-energy and particle physics, gaseous radiation detectors are undergoing continuous development. The first part of this book provides a solid background for understanding the basic processes leading to the detection and tracking of charged particles, photons, and by: Measurement of dijet cross sections in ep interactions with a leading neutron in HERA.

Preprint DESY In European Physical Journal C. Vol, no.3 (), p hep-ex/ The top quark, sometimes also referred to as the truth quark, (symbol: t) is the most massive of all observed elementary derives its mass from its coupling to the Higgs coupling is very close to unity and is the largest (strongest) coupling in the standard model at the scale of the weak interactions and above.

The top quark was discovered in by the CDF and DØ Composition: Elementary particle. The Table of Contents for the book is as follows: * VOLUME I * Foreword * Conference Organization * Welcome Address * PLENARY SESSIONS * Pl New Results in Spectroscopy * New Results in Spectroscopy * Pl Soft Interactions and Diffraction Phenomena * Soft Interactions and Diffraction Phenomena * Pl Spin Structure of the Nucleon * Spin Structure of the Nucleon * Pl QCD.

Study of the pion trajectory in the photoproduction of leading neutrons at HERA DESY hep-ex/ Spires: UCL Observation of isolated high-E_T photons in deep inelastic scattering DESY hep-ex/ Spires: UCL Photoproduction of D *+/-Mesons Associated with a Leading Neutron DESY hep-ex/ Spires: UCL.

In the area of inclusive DIS, both H1 and ZEUS completed last year their high Q2 Neutral and Charged current measurements exploiting the large statistics from the HERA II running period. For inclusive charm production, H1 and ZEUS published a combination of numerous existing measurements based on various tagging methods.

Leading neutron production in e+p collisions at HERA Chekanov, S., Krakauer, D., Magill, S., Musgrave, B., Pellegrino, A., Repond, J., Yoshida, R., Mattingly, M. Much of the physics of nuclei and polarisation has been studied at previous workshops, and frequent reference was made to the HERA eA workshops [1], to the HERA spin workshops [2], to the EIC white book [3], to the THERA book [4], to the TESLA-N [5] and to the ELFE [6] proposals.

Top and b physics at the Tevatron. 34th International Symposium on Multiparticle Dynamics, Sonoma County, California, USA, July 26 - August 1, In Acta.

A new method is employed to measure the neutral current cross-section up to Bjorken 𝑥 values of 1 with the ZEUS detector at HERA using an integrated luminosity of pb-1 of electron–proton collisions and pb-1 of positron–proton collisions, at a centre-of-mass energy of GeV. Observation of events with an energetic forward neutron in deep inelastic scattering at HERA Derrick, M., Krakauer, D., Magill p scattering using data from the ZEUS detector at HERA Derrick, M., Krakauer, D., Magill, S., Mikunas, D., Musgrave, B The ZEUS Leading Proton Spectrometer and its use in the measurement of elastic rho(0.

The group led by Uri Karshon and including also Yehuda Eisenberg, participates in the ZEUS experiment at the HERA accelerator which provides e-p collisions at the DESY laboratory in Hamburg.

The group is specifically involved in the analysis of the production of the heavy quark "charm" with data from the upgraded HERA machine and ZEUS detector.Forward Detector (FDET) The Forward Tracking Detector (FTD) The Transition Radiation Detector (TRD) The Rear Tracking Detector (RTD) The Vertex Detector (VXD) 4 The ZEUS Trigger Environment Introduction Overview of Data-flow Rates and Background The Trigger The First Level Trigger The total integrated e-p luminosity delivered to the H1 and ZEUS experiments was about × 10 39 cm −2, conventionally denoted as fb −1 each.

Moreover, HERA only collided electrons with protons, never any other ions. HERA pioneered the use of polarized stored electron beams in collisions.