A small electromagnetic sampling calorimeter, installed in the ZEUS experiment in 1995, significantly enhanced the acceptance for very low x and low Q^2 inelastic neutral current scattering, e^{+}p \to e^{+}X, at HERA. A measurement of the proton structure function F_2 and the total virtual photon-proton (\gamma^*p) cross-section is presented for 0.11 \le Q^{2} \le 0.65 GeV^2 and 2 \times 10^{-6} \le x \le 6 \times 10^{-5}, corresponding to a range in the \gamma^{*}p c.m. energy of 100 \le W \le 230 GeV. Comparisons with various models are also presented.

ZEUS (particle detector)

Low energy

Neutral current

Structure function

Calorimeter (particle physics)

10.1016/s0370-2693(97)00905-2

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Citations (133)

Measurement of the Velocity of Neutrinos from the CNGS Beam with the Large Volume Detector

Physical Review Letters (2012)

N. Yu. Agafonova M. Aglietta P. Antonioli V. V. Ashikhmin G. Bari

We report the measurement of the time of flight of $\ensuremath{\sim}17\text{ }\text{ }\mathrm{GeV}$ ${\ensuremath{\nu}}_{\ensuremath{\mu}}$ on the CNGS baseline (732 km) with the Large Volume Detector (LVD) at the Gran Sasso Laboratory. The CERN-SPS accelerator has been operated from May 10th to May 24th 2012, with a tightly bunched-beam structure to allow the velocity of neutrinos to be accurately measured on an event-by-event basis. LVD has detected 48 neutrino events, associated with the beam, with a high absolute time accuracy. These events allow us to establish the following limit on the difference between the neutrino speed and the light velocity: $\ensuremath{-}3.8\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}6}<({v}_{\ensuremath{\nu}}\ensuremath{-}c)/c<3.1\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}6}$ (at 99% C.L.). This value is an order of magnitude lower than previous direct measurements.

10.1103/physrevlett.109.070801

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Citations (42)

Measurement of beauty production in DIS and extraction at ZEUS

The European Physical Journal C (2010)

H. Abramowicz I. Abt L. Adamczyk M. Adamus R. Aggarwal

Beauty production in deep inelastic scattering with events in which a muon and a jet are observed in the final state has been measured with the ZEUS detector at HERA using an integrated luminosity of 114 pb^-1. The fraction of events with beauty quarks in the data was determined using the distribution of the transverse momentum of the muon relative to the jet. The cross section for beauty production was measured in the kinematic range of photon virtuality, Q^2 > 2 Gev^2, and inelasticity, 0.05 < y < 0.7, with the requirement of a muon and a jet. Total and differential cross sections are presented and compared to QCD predictions. The beauty contribution to the structure function F_2 was extracted and is compared to theoretical predictions.

ZEUS (particle detector)

Beauty

10.1140/epjc/s10052-010-1423-2

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Citations (18)

Measurement of azimuthal asymmetries in deep inelastic scattering

Physics Letters B (2000)

J. Breitweg S. Chekanov M. Derrick D. Krakauer S. Magill

ZEUS (particle detector)

Perturbative QCD

Neutral current

10.1016/s0370-2693(00)00430-5

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Citations (46)

Measurement of exclusive ω electroproduction at HERA

Physics Letters B (2000)

J. Breitweg S. Chekanov M. Derrick D. Krakauer S. Magill

ZEUS (particle detector)

10.1016/s0370-2693(00)00794-2

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Citations (54)

Validation of techniques to mitigate copper surface contamination in CUORE

Astroparticle Physics (2013)

F. Alessandria Raffaele Ardito D. R. Artusa F.T. Avignone O. Azzolini

10.1016/j.astropartphys.2013.02.005

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Citations (72)

Lowering the Energy Threshold of the CUORE Experiment: Benefits in the Surface Alpha Events Reconstruction

Journal of Low Temperature Physics (2020)

A. Campani Douglas Q. Adams C. Alduino K. Alfonso F. T. Avignone

WIMP

10.1007/s10909-020-02487-2

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Citations (5)

First events of the CNGS beam detected by LVD

N. Yu. Agafonova M. Aglietta P. Antonioli G. Bari A. Bonardi

Source

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Citations (0)

Single and multiple muon events in the LVD detector

Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment (1990)

G. Anzivino S. Bianco R. Casaccia F. Cindolo M. De Felice

Multiplicity (mathematics)

Energy spectrum

10.1016/0168-9002(90)90728-o

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Citations (0)

Results from the Cuore Experiment †

Universe (2019)

A. Caminata Douglas Q. Adams C. Alduino K. Alfonso F. T. Avignone

The Cryogenic Underground Observatory for Rare Events (CUORE) is the first bolometric experiment searching for neutrinoless double beta decay that has been able to reach the 1-ton scale. The detector consists of an array of 988 TeO 2 crystals arranged in a cylindrical compact structure of 19 towers, each of them made of 52 crystals. The construction of the experiment was completed in August 2016 and the data taking started in spring 2017 after a period of commissioning and tests. In this work we present the neutrinoless double beta decay results of CUORE from examining a total TeO 2 exposure of 86.3 kg yr , characterized by an effective energy resolution of 7.7 keV FWHM and a background in the region of interest of 0.014 counts / ( keV kg yr ) . In this physics run, CUORE placed a lower limit on the decay half-life of neutrinoless double beta decay of 130 Te > 1.3 · 10 25 yr (90% C.L.). Moreover, an analysis of the background of the experiment is presented as well as the measurement of the 130 Te 2 ν β β decay with a resulting half-life of T 1 / 2 2 ν = [ 7.9 ± 0.1 ( stat . ) ± 0.2 ( syst . ) ] × 10 20 yr which is the most precise measurement of the half-life and compatible with previous results.

Beta decay

Ton

Half-life

10.3390/universe5010010

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Citations (7)