scholarly journals Antimatter Free-Fall Experiments and Charge Asymmetry

Symmetry ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 1192
Author(s):  
Ulrich David Jentschura
Keyword(s):  
Field Theory ◽  
Asymmetry Parameter ◽  
Charge Asymmetry ◽  
Free Fall ◽  
Experimental Setup ◽  
Charge Neutrality ◽  
The Earth ◽  
Antimatter Gravity ◽  
Precision Test ◽  
Theoretical Side

We propose a method by which one could use modified antimatter gravity experiments in order to perform a high-precision test of antimatter charge neutrality. The proposal is based on the application of a strong, external, vertically oriented electric field during an antimatter free-fall gravity experiment in the gravitational field of the Earth. The proposed experimental setup has the potential to drastically improve the limits on the charge-asymmetry parameter ϵ¯q of antimatter. On the theoretical side, we analyze possibilities to describe a putative charge-asymmetry of matter and antimatter, proportional to the parameters ϵq and ϵ¯q, by Lagrangian methods. We found that such an asymmetry could be described by four-dimensional Lorentz-invariant operators that break CPT without destroying the locality of the field theory. The mechanism involves an interaction Lagrangian with field operators decomposed into particle or antiparticle field contributions. Our Lagrangian is otherwise Lorentz, as well as PT invariant. Constraints to be derived on the parameter ϵ¯q do not depend on the assumed theoretical model.

scholarly journals Chou-Yang Model for Forward-Backward Multiplicity Correlations at 7 TeV using Generalized Multiplicity Distribution.

2019 ◽  
Vol 206 ◽  
pp. 09005
Author(s):  
S.W. Phang ◽  
A.H. Chan ◽  
C.H. Oh ◽  
E. Yuen ◽  
Z. Ong ◽  
...  
Keyword(s):  
Asymmetry Parameter ◽  
Cluster Size ◽  
Multiplicity Distribution ◽  
Charge Asymmetry ◽  
Least Square ◽  
Least Square Fitting ◽  
Correlation Strength ◽  
Linear Least Square ◽  
Work Done ◽  
Stochastic Distribution

The basis of the Chou-Yang model is made up of a stochastic and non-stochastic distribution and has been successful in describing forward-backward multiplicities.[1] This project examines data drawn from CERN’s 7 TeV run where we revist the Chou-Yang model’s components. It also approaches phenomenological descriptions for cluster sizes from forward-backward multiplicaity correlation strength by the E735 collaboration.[6] For the stochastic binomial component, it examines the variance of the charge asymmetry parameter z with regards to fixed total charged multiplicities n. The fitting of the Generalized Multiplicity distribution along with the linear least square fitting of the forward backward multiplicity is analysed. The parameters for the Generalized Multiplicity Distribution is presented along with an investigation on the cluster size r.[3] This serves as an extention to the work done by W.Y Wang’sWeighted GMD model at7TeV, however the nonweighted GMD model is used here.[7]

scholarly journals Field theory as free fall

1996 ◽  
Vol 13 (6) ◽  
pp. 1339-1351 ◽  
Author(s):  
J Greensite
Keyword(s):  
Field Theory ◽  
Free Fall

scholarly journals APSIS: AN ARTIFICIAL PLANETARY SYSTEM IN SPACE TO PROBE EXTRA-DIMENSIONAL GRAVITY AND MOND

2008 ◽  
Vol 17 (03n04) ◽  
pp. 453-466 ◽  
Author(s):  
VARUN SAHNI ◽  
YURI SHTANOV
Keyword(s):  
Planetary System ◽  
Free Fall ◽  
Experimental Conditions ◽  
Spacecraft Design ◽  
Fifth Dimension ◽  
The Earth ◽  
Perihelion Shift ◽  
Dimensional Gravity ◽  
Free Environment ◽  
Sources Of Contamination

A proposal is made to test Newton's inverse-square law using the perihelion shift of test masses (planets) in free fall within a spacecraft located at the Earth–Sun L2 point. Such an artificial planetary system in space (APSIS) will operate in a drag-free environment with controlled experimental conditions and minimal interference from terrestrial sources of contamination. We demonstrate that such a space experiment can probe the presence of a "hidden" fifth dimension on the scale of a micron, if the periapsis shift of a "planet" can be measured to sub-arc-second accuracy. Some suggestions for spacecraft design are made.

Development of High Precision Test Masses for the MICROSCOPE Space Project

2014 ◽  
Vol 613 ◽  
pp. 381-391
Author(s):  
Daniel Hagedorn ◽  
Heinz Peter Heyne ◽  
Stephan Metschke ◽  
Uwe Langner ◽  
Vincent Lebat ◽  
...  
Keyword(s):  
High Precision ◽  
Outer Shell ◽  
The Earth ◽  
Space Project ◽  
Hollow Cylinders ◽  
Precision Test

The MICROSCOPE (MicroSatellite à traînée Compensée pour l'Observation du Principe d'Equivalence) project is an orbit-based mission to verify the Weak Equivalent Principle with an uncertainty of 10-15. To achieve this goal two differential accelerometer, each equipped with two high precision test masses (made of PtRh10 and TiAl6V4 in the form of hollow cylinders with four flats at the outer shell and six precision countersinks at each face), are to be launched in Spring 2016 and shall orbit the earth for approx. one and a half year.

scholarly journals Rancang Bangun Alat Peraga Fisika Berbasis Arduino (Studi Kasus Gerak Jatuh Bebas)

CYCLOTRON ◽  
2019 ◽  
Vol 2 (1) ◽  
Author(s):  
Migdes C Kause
Keyword(s):  
Free Fall ◽  
Average Score ◽  
Electronic Components ◽  
Push Button ◽  
C Language ◽  
Design Learning ◽  
The Earth ◽  
Main Components ◽  
Teaching Physics ◽  
Test Result

Abstrak— Telah dilakukan rancang bangun alat peraga fisika pada kasus gerak jatuh bebas berbasis Arduino. Alat peraga yang telah dikembangkan bertujuan untuk memvisualisasikan fenomena gerak jatuh bebas dan mengukur percepatan gravitasi bumi dan membuktikan konsep-onsep gerak jatuh bebas. Rancang bangun alat peraga menggunakan komponen elektronik seperti Arduino, sensor inframerah, sensor ultrasonik, push button, LCD, relay, dan LED sebagai komponen utama perangkat keras (hardware). Perangkat lunak (software) yang digunakan dalam mengembangkan alat peraga ini memanfaatkan compiler IDE Arduino berbasis bahasa C#. Besaran fisis yang diukur menggunakan alat peraga yang dikembangkan dalam penelitian ini adalah ketinggian benda dan waktu tempuh benda. Hasil pengujian kinerja alat peraga yang dikembangkan menunjukkan bahwa alat peraga mampu memvisualisasikan fenomena gerak jatuh bebas, mengukur percepatan gravitasi bumi dengan nilai rata-rata sebesar 10,2 m/s2, dan membuktikan konsep-konsep dalam gerak jatuh bebas. Kata kunci: Alat Peraga, Arduino, Gerak Jatuh Bebas Abstract— There is an effort to design learning media for teaching physics on free fall based on Arduino. The learning media designed is aimed at visualizing free fall phenomena, measuring earth gravitation speed, and proofing the concepts of free fall. Designing learning media using electronic components such as Arduino, infrared sensor, ultrasonic sensor, pushbutton, LCD, relay, and LED as the main components hardware devices.  Software devices which are used to improve this learning media were IDE Arduino Compiler C# language base. Physics quantity which is measured using the designed learning media in this study were the object’s height and the needed time. The test result of the designed learning media this study showed that this learning media could visualize free fall phenomena, measure the earth gravitation speed with the average score was  10,2 m/s2 , and proofing free fall concepts. Keywords: Learning Media, Arduino, Free Fall

scholarly journals Gravity Field Theory

2021 ◽  
Author(s):  
Ahmed Shehab Ahmed Al-Banna
Keyword(s):  
Field Theory ◽  
Gravity Field ◽  
Geophysical Methods ◽  
The Other ◽  
Earth Surface ◽  
Gravity Method ◽  
Geophysical Model ◽  
The Earth ◽  
Figure Of The Earth ◽  
Model Understanding

Gravity keep all things on the earth surface on the ground. Gravity method is one of the oldest geophysical methods. It is used to solve many geological problems. This method can be integrated with the other geophysical methods to prepare more accepted geophysical model. Understanding the theory and the principles concepts considered as an important step to improve the method. Chapter one attempt to discuss Newton’s law, potential and attraction gravitational field, Geoid, Spheroid and geodetically figure of the earth, the gravity difference between equator and poles of the earth and some facts about gravity field.

scholarly journals Charge Asymmetry in Top Quark Pair Production

Symmetry ◽  
2020 ◽  
Vol 12 (8) ◽  
pp. 1278
Author(s):  
Roman Lysák
Keyword(s):  
Elementary Particle ◽  
Pair Production ◽  
Top Quark ◽  
Charge Asymmetry ◽  
New Physics ◽  
Current Theory ◽  
Elementary Particles ◽  
Standard Deviations ◽  
Theoretical Side

The top quark is the heaviest elementary particle known. It has been proposed many times that new physics beyond the current theory of elementary particles may reveal itself in top quark interactions. The charge asymmetry in the pair production of a fermion and its antiparticle has been known for many decades. Early measurements of such asymmetry in top quark pair production showed a disagreement with the prediction by more than 3 standard deviations. Many years of an effort on both experimental and theoretical side have allowed to understand the top quark pair charge asymmetry better and to bring back the agreement between the measurements and the theory. In this article, these efforts are reviewed together with the discussion about a potential future of such measurements.

Optimising the acceleration due to gravity on a planet's surface

2010 ◽  
Vol 94 (530) ◽  
pp. 203-215
Author(s):  
Michael Jewess
Keyword(s):  
Sea Level ◽  
Free Fall ◽  
Gravitational Effect ◽  
Oblate Spheroid ◽  
Practical Significance ◽  
Axis Of Rotation ◽  
The Earth ◽  
Equatorial Diameter ◽  
Ellipsoid Of Revolution ◽  
Rotation Of The Earth

The Earth (more precisely, the ‘geoid’ thereof) is known to approximate closely to a slightly oblate spheroid whose unique axis coincides with the Earth's axis of rotation [1,2]. (By ‘spheroid’ is meant is an ellipsoid of revolution, i.e. one with two semi-axes equal; a slightly oblate one has these two semi-axes slightly longer than the unique one.) To the nearest km, the diameter of the ‘geoid’ pole-to-pole is 43 km less than the equatorial diameter of 12756 km. There is a reduction of practical significance (0.527%) in the acceleration of free fall" at sea level between the poles and the equator, and therefore in the weight of objects. Of this, 0.345% derives directly from the rotation of the Earth; the balance of 0.182% results from the purely gravitational effect of the Earth's deviation from sphericity.

The Phenomenology of Electric Discharges Generated between a Negatively Charged Water Aerosol Cloud and Earth

Vestnik MEI ◽  
2020 ◽  
Vol 6 (6) ◽  
pp. 53-59
Author(s):  
Nikolay Yu. Lysov ◽  
◽  
Aleksandr V. Orlov ◽  
Aleksandr G. Temnikov ◽  
Leonid L. Chernensky ◽  
...  
Keyword(s):  
Electric Field ◽  
Optical Sensors ◽  
Negative Polarity ◽  
Measuring Instruments ◽  
Experimental Setup ◽  
Electric Discharges ◽  
Electrical Discharges ◽  
Aerosol Cloud ◽  
The Earth ◽  
Charged Aerosol

Studies of electrical discharges generated in the electric field of charged aerosol clouds make it possible to obtain better understanding of how lightning occurs in thunderclouds. For this purpose, an experimental setup was developed, which allows charged aerosol clouds of negative polarity to be produced. A charged aerosol cloud creates electric field strength sufficient to generate electrical discharges between this cloud and the earth. The experimental setup for obtaining an artificially produced charged aerosol cloud is briefly described. The experimental setup is equipped with a set of measuring instruments for recording the electrical and optical signals of discharges and for photographing the discharges themselves. A database has been accumulated in the course of experiments, which includes the waveforms of discharge current pulses recorded using digital oscilloscopes, the waveforms of signals from optical sensors recording the development of discharges in space and time, and the snapshots of discharges. By using the accumulated information it is possible to classify discharges that occur between artificially produced charged aerosol clouds of negative polarity and the earth by type and parameters. An analysis of the experimental data has shown that both upward and downward discharges can occur between a charged aerosol cloud and the earth, which is typical for natural lightning phenomena. The snapshots of the most characteristic types of electric discharges observed in experiments and simple models explaining the development of these discharges are studied.

scholarly journals Antimatter Gravity: Second Quantization and Lagrangian Formalism

Physics ◽  
2020 ◽  
Vol 2 (3) ◽  
pp. 397-411
Author(s):  
Ulrich D. Jentschura
Keyword(s):  
Dirac Equation ◽  
Flat Space ◽  
Space Time ◽  
Charge Conjugation ◽  
Lagrangian Formalism ◽  
Curved Space ◽  
The Earth ◽  
Antimatter Gravity ◽  
Quantized Field ◽  
Charge Conjugation Parity

The application of the CPT (charge-conjugation, parity, and time reversal) theorem to an apple falling on Earth leads to the description of an anti-apple falling on anti–Earth (not on Earth). On the microscopic level, the Dirac equation in curved space-time simultaneously describes spin-1/2 particles and their antiparticles coupled to the same curved space-time metric (e.g., the metric describing the gravitational field of the Earth). On the macroscopic level, the electromagnetically and gravitationally coupled Dirac equation therefore describes apples and anti-apples, falling on Earth, simultaneously. A particle-to-antiparticle transformation of the gravitationally coupled Dirac equation therefore yields information on the behavior of “anti-apples on Earth”. However, the problem is exacerbated by the fact that the operation of charge conjugation is much more complicated in curved, as opposed to flat, space-time. Our treatment is based on second-quantized field operators and uses the Lagrangian formalism. As an additional helpful result, prerequisite to our calculations, we establish the general form of the Dirac adjoint in curved space-time. On the basis of a theorem, we refute the existence of tiny, but potentially important, particle-antiparticle symmetry breaking terms in which possible existence has been investigated in the literature. Consequences for antimatter gravity experiments are discussed.

Sign in / Sign up

Export Citation Format

Share Document