scholarly journals A Fast Universal Kinematic Fitting Code for Low-Energy Nuclear Physics: FUNKI_FIT

Physics ◽  
2019 ◽  
Vol 1 (3) ◽  
pp. 375-391 ◽  
Author(s):  
Robin Smith ◽  
Jack Bishop
Keyword(s):  
Charged Particle ◽  
Particle Physics ◽  
Nuclear Physics ◽  
High Energy ◽  
Low Energy ◽  
High Energy Particle ◽  
Monte Carlo Data ◽  
Standard Data ◽  
Strip Detectors ◽  
Low Energy Nuclear Physics

We present an open-source kinematic fitting routine designed for low-energy nuclear physics applications. Although kinematic fitting is commonly used in high-energy particle physics, it is rarely used in low-energy nuclear physics, despite its effectiveness. A FORTRAN and ROOT C++ version of the FUNKI_FIT kinematic fitting code have been developed and published open access. The FUNKI_FIT code is universal in the sense that the constraint equations can be easily modified to suit different experimental set-ups and reactions. Two case studies for the use of this code, utilising experimental and Monte–Carlo data, are presented: (1) charged-particle spectroscopy using silicon-strip detectors; (2) charged-particle spectroscopy using active target detectors. The kinematic fitting routine provides an improvement in resolution in both cases, demonstrating, for the first time, the applicability of kinematic fitting across a range of nuclear physics applications. The ROOT macro has been developed in order to easily apply this technique in standard data analysis routines used by the nuclear physics community.

Prospects for Electric Dipole Moment Measurement Using Electrostatic Accelerators

2019 ◽  
Vol 10 (01) ◽  
pp. 267-301
Author(s):  
Richard Talman
Keyword(s):  
Elementary Particle ◽  
Electric Fields ◽  
Electric Dipole ◽  
Particle Physics ◽  
Nuclear Physics ◽  
Dipole Moments ◽  
High Energy ◽  
Low Energy ◽  
Diagnostic Tools ◽  
Elementary Particle Physics

Electrostatic accelerators have played a glorious role in physics, especially for low energy atomic and nuclear physics and electron microscopy. But circular accelerators have depended almost exclusively on the far greater bending force possible with static magnetic, rather than electric, fields. There is a potential exception to this magnetic bending monopoly for experimental high energy elementary particle physics — it is the possibility of measuring the electric dipole moments (EDMs) of charged elementary particles, such as proton, deuteron, or electron, using an electrostatic storage ring. Any such non-zero EDM would demonstrate violation of both parity (P) and time-reversal (T) invariance. One way of understanding the preponderance of matter over anti-matter in the present-day universe pre-supposes the existence of violations of P and T substantially greater than are allowed by the “standard model” of elementary particle physics. This provides the leading motivation for measuring EDMs. Currently, only upper limits are known for these EDMs. The very same smallness that makes it important to determine them makes their measurement difficult. Accepting as obvious the particle physics motivation, this paper concentrates on the accelerator physics of the (not very) high energy electrostatic accelerators needed for EDM measurements. Developments already completed are emphasized. Impressive advances have been made in the diagnostic tools, spin control and polarimetry that will make EDM measurement possible. Ring design for minimizing spin decoherence and limiting systematic EDM errors is presented. There have, however, been worrisome indications from low energy rings, concerning beam current limitations. A prototype ring design is proposed for investigating and addressing this concern.

scholarly journals LARGE-x CONNECTIONS OF NUCLEAR AND HIGH-ENERGY PHYSICS

2013 ◽  
Vol 28 (35) ◽  
pp. 1330032 ◽  
Author(s):  
ALBERTO ACCARDI
Keyword(s):  
Particle Physics ◽  
Nuclear Physics ◽  
High Energy Physics ◽  
High Energy ◽  
Distribution Functions ◽  
High Energy Particle ◽  
Hadron Structure ◽  
Energy Particle ◽  
Parton Distribution Functions ◽  
Energy Physics

I discuss how global QCD fits of parton distribution functions (PDFs) can make the somewhat separated fields of high-energy particle physics and lower energy hadronic and nuclear physics interact to the benefit of both. I review specific examples of this interplay from recent works of the CTEQ-Jefferson Lab collaboration, including hadron structure at large parton momentum and gauge boson production at colliders. I devote particular attention to quantifying theoretical uncertainties arising in the treatment of large partonic momentum contributions to deep inelastic scattering (DIS) observables, and to discussing the experimental progress needed to reduce these.

Reminiscences and discoveries: James Chadwick at Liverpool

1994 ◽  
Vol 48 (2) ◽  
pp. 299-308 ◽  
Keyword(s):  
Particle Physics ◽  
Nuclear Physics ◽  
Atomic Bomb ◽  
High Energy ◽  
Business Community ◽  
High Energy Particle ◽  
Energy Particle ◽  
One Year ◽  
The University ◽  
New Facilities

There have been recent articles in Notes and Records concerning James Chadwick’s contributions to the development of the atomic bomb, and it seemed worthwhile to supplement these with some remarks on Chadwick’s establishment of an important centre of nuclear physics research in Liverpool, especially since I believe this was the achievement which gave him more satisfaction than any other. The following is the abridged text of a lecture given at the Centenary Celebrations at the University of Liverpool in October 1991. Chadwick came to Liverpool in 1935, the year in which he was awarded the Nobel Prize, and held the Lyon Jones Chair of Physics for 13 years. During that time he transformed the department from one which was quite ill-equipped for research, into one which would be able to stand comparison with any in the world in the fields of nuclear physics and high-energy particle physics. The University had been able to attract him by promising to support him with the provision of new staff posts and with help in building up new facilities for research. In addition he already had friends within the university and the business community through his wife, who came from a well-known Liverpool family. He had also, I think, begun to feel that the time had come to leave Cambridge, perhaps because Rutherford was reluctant to contemplate the sort of expenditure which Chadwick realized was necessary to carry forward research in nuclear physics. Chadwick’s plans for Liverpool were centred around the construction of a cyclotron which would cost about £5000, roughly equal to Rutherford’s laboratory budget for one year

Nuclear physics today and in Rutherford’s day

1972 ◽  
Vol 27 (1) ◽  
pp. 25-44
Keyword(s):  
Particle Physics ◽  
Nuclear Physics ◽  
Early Stage ◽  
High Energy ◽  
Personal Contact ◽  
High Energy Particle ◽  
Second Phase ◽  
Wave Mechanics ◽  
Cavendish Laboratory ◽  
Electron Distributions

I have entitled, this lecture ‘Nuclear physics today and in Rutherford’s day’ but it must be made clear at the outset that what I am taking as nuclear physics today is high energy particle physics rather than the study of nuclear structure and what I am defining as Rutherford’s day is the period 1929-1937 during which I had direct personal contact with him. This autumnal period of his career was a golden one. It marked the end of an era while at the same time containing already the seeds of change which led to the remarkable expansion of the subject in the postwar epoch. The period begins only three years after the discovery of the equations of wave mechanics which brought to an end perhaps the darkest age of confusion to beset the development of physical science, a time when one kind of experiment seemed to prove positively that light was a wave motion and another that it was with equal certainty a stream of particles. The new mechanics and its influence on atomic physics was still in its early stage but its appearance initiated, on a sound exploitable basis, the first phase in the development of the study of atomic structure. It became possible to investigate and interpret in detail the electron distributions in atoms, their relations to atomic and molecular properties and thence to the properties of matter in bulk. The Cavendish Laboratory in 1929 was, however, already concentrating attention on the exploration of the atomic nucleus, research designed to carry the study of the structure of matter to a second phase. This was Rutherford’s prime interest.

Microfabrication research at the National Submicron Facility

1983 ◽  
Vol 41 ◽  
pp. 86-89
Author(s):  
E.D. Wolf
Keyword(s):  
Integrated Circuits ◽  
Particle Physics ◽  
High Speed ◽  
New Technology ◽  
High Energy ◽  
High Energy Particle ◽  
New Science ◽  
Wide Range ◽  
Intermediate Domain ◽  
Circuit Function

Most microelectronics devices and circuits operate faster, consume less power, execute more functions and cost less per circuit function when the feature-sizes internal to the devices and circuits are made smaller. This is part of the stimulus for the Very High-Speed Integrated Circuits (VHSIC) program. There is also a need for smaller, more sensitive sensors in a wide range of disciplines that includes electrochemistry, neurophysiology and ultra-high pressure solid state research. There is often fundamental new science (and sometimes new technology) to be revealed (and used) when a basic parameter such as size is extended to new dimensions, as is evident at the two extremes of smallness and largeness, high energy particle physics and cosmology, respectively. However, there is also a very important intermediate domain of size that spans from the diameter of a small cluster of atoms up to near one micrometer which may also have just as profound effects on society as “big” physics.

scholarly journals REVIEW OF THE PHENOMENOLOGY OF NONCOMMUTATIVE GEOMETRY

2004 ◽  
Vol 19 (02) ◽  
pp. 179-204 ◽  
Author(s):  
I. HINCHLIFFE ◽  
N. KERSTING ◽  
Y. L. MA
Keyword(s):  
Electric Dipole ◽  
Particle Physics ◽  
Extra Dimensions ◽  
Linear Collider ◽  
Dipole Moments ◽  
High Energy ◽  
Low Energy ◽  
Electric Dipole Moments ◽  
The Status ◽  
High Energy Scattering

We present a pedagogical review of particle physics models that are based on the noncommutativity of space–time, [Formula: see text], with specific attention to the phenomenology these models predict in particle experiments either in existence or under development. We summarize results obtained for high energy scattering such as would occur, for example, in a future e+e-linear collider with [Formula: see text], as well as low energy experiments such as those pertaining to elementary electric dipole moments and other CP violating observables, and finally comment on the status of phenomenological work in cosmology and extra dimensions.

All-Union Conference on High Energy Particle Physics

Atomic Energy ◽  
1956 ◽  
Vol 1 (4) ◽  
pp. 621-632
Author(s):  
V. A. Biryukov ◽  
B. M. Golovin ◽  
L. I. Lapidus
Keyword(s):  
Particle Physics ◽  
High Energy ◽  
High Energy Particle ◽  
Energy Particle ◽  
Union Conference

scholarly journals Programmable combinational logic trigger system for high energy particle physics experiments

1977 ◽  
Vol 140 (3) ◽  
pp. 549-552 ◽  
Author(s):  
E.D. Platner ◽  
A. Etkin ◽  
K.J. Foley ◽  
J.H. Goldman ◽  
W.A. Love ◽  
...  
Keyword(s):  
Particle Physics ◽  
High Energy ◽  
High Energy Particle ◽  
Combinational Logic ◽  
Trigger System ◽  
Energy Particle ◽  
Physics Experiments
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