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Albrow, M. G.

Publications and source records attributed to Albrow, M. G..

11 records
All sourcesNASA NTRSDOE OSTI
DOE OSTI2023

Ultra high energy cosmic rays The intersection of the Cosmic and Energy Frontiers

The present white paper is submitted as part of the “Snowmass” process to help inform the long-term plans of the United States Department of Energy and the National Science Foundation for high-energy physics. It summarizes the science questions driving the Ultra-High-Energy Cosmic-Ray (UHECR) community and provides recommendations on the strategy to answer them in the next two decades.

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND ↗
DOE OSTI2022

Ultra high energy cosmic rays The intersection of the Cosmic and Energy Frontiers

The present white paper is submitted as part of the "Snowmass" process to help inform the long-term plans of the United States Department of Energy and the National Science Foundation for high-energy physics. Further, it summarizes the science questions driving the Ultra-High-Energy Cosmic-Ray (UHECR) community and provides recommendations on the strategy to answer them in the next two decades.

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS↗
DOE OSTI2022

FACET: a new long-lived particle detector in the very forward region of the CMS experiment

We describe a proposal to add a set of very forward detectors to the CMS experiment for the high-luminosity era of the Large Hadron Collider to search for beyond the standard model long-lived particles, such as dark photons, heavy neutral leptons, axion-like particles, and dark Higgs bosons. The proposed subsystem is called FACET for Forward-Aperture CMS ExTension, and will be sensitive to any particles that can penetrate at least 50 m of magnetized iron and decay in an 18 m long, 1 m diameter vacuum pipe. The decay products will be measured in detectors using identical technology to the planned CMS Phase-2 upgrade.

Particle and Resonance Production↗
DOE OSTI2016

Fermilab Testbeam Facility Annual Report – FY 2016

This Technical Memorandum (TM) summarizes the Fermilab Test Beam operations for FY 2015. It is one of a series of annual publications intended to gather information in one place. In this case, the information concerns the individual experiments that ran at FTBF, which are tabulated. Each experiment section was prepared by the relevant authors, and was edited for inclusion in this summary.

43 PARTICLE ACCELERATORS↗
DOE OSTI2015

Fermilab Testbeam Facility Annual Report – FY 2015

This Technical Memorandum (TM) summarizes the Fermilab Test Beam operations for FY 2015. It is one of a series of annual publications intended to gather information in one place. In this case, the information concerns the individual experiments that ran at FTBF and are listed in Table TB-1. Each experiment section was prepared by the relevant authors, and was edited for inclusion in this summary.

43 PARTICLE ACCELERATORS↗
DOE OSTI2015

Measurement of central exclusive π⁺ π⁻ production in p p ¯ collisions at √s = 0.9 and 1.96 TeV at CDF

We measure exclusive π⁺ π⁻ production in proton-antiproton collisions at center-of-mass energies √s = 0.9 and 1.96 TeV in the Collider Detector at Fermilab. We select events with two oppositely charged particles, assumed to be pions, with pseudorapidity |η| < 1.3 and with no other particles detected in |η| < 5.9. We require the π⁺ π⁻ system to have rapidity |y| < 1.0. The production mechanism of these events is expected to be dominated by double pomeron exchange, which constrains the quantum numbers of the central state. The data are potentially valuable for isoscalar meson spectroscopy and for understanding the pomeron in a region of transition between nonperturbative and perturbative quantum chromodynamics. The data extend up to dipion mass M(π⁺ π⁻) = 5000 MeV / c² and show resonance structures attributed to f₀ and f₂ (1270) mesons. From the π⁺ π⁻ and K⁺K⁻ spectra, we place upper limits on exclusive χ c0 (3415) production.

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS↗
DOE OSTI2012

Waveform digitization for high resolution timing detectors with silicon photomultipliers

The results of time resolution studies with silicon photomultipliers (SiPMs) read out with high bandwidth constant fraction discrimination electronics were presented earlier [1-3]. Here we describe the application of fast waveform digitization readout based on the DRS4 chip [4], a switched capacitor array (SCA) produced by the Paul Scherrer Institute, to further our goal of developing high time resolution detectors based on SiPMs. The influence of the SiPM signal shape on the time resolution was investigated. Different algorithms to obtain the best time resolution are described, and test beam results are presented.

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND ↗
DOE OSTI2012

Central exclusive production of hadrons in CDF

At the Fermilab Tevatron with $\sqrt{s}$ = 900 and 1960 GeV, we have studied exclusive double pomeron exchange in the Collider Detector at Fermilab, CDF. With $\sim$300,000 events we present the mass spectrum of two hadrons, $h^+h^-$, assumed to be pions, with $|\eta(\pi)| <$ 1.3 and two rapidity gaps $\Delta \eta > 4.6$. The mass spectrum shows resonance structures, including $f_0(980),f_2(1270),$ and$ f_0(1370)$. The cross section ratio 1960 GeV/900 GeV and the mean $p_T(pair)$ show mass-dependent structures, even above $M$ = 2 GeV where there are no established $\pi^+\pi^-$ resonances. The data extend above $M$ = 5 GeV. We place an upper limit on exclusive $\chi_{c0} \rightarrow \pi^+\pi^-$ and $K^+K^-$.

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS↗
DOE OSTI2010

Accelerator Data for Cosmic Ray Physics

I present selected examples of accelerator data, mainly from hadron colliders, that are relevant for understanding cosmic ray showers. I focus on the forward region, $x_{Feynman} > 0.05$, where high energy data are scarce, since the emphasis in collider physics became high-$p_T$ phenomena.

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS↗