The Search for Stable, Massive,  Elementary Particles

Перл, М.; Kim, Peter C.; Halyo, V.; Lee, Eric R.; Lee, Irwin T.; Loomba, D.; Lackner, Klaus S.

doi:10.1142/s0217751x01003548

Cited by 64 publications

(75 citation statements)

References 81 publications

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“…Indeed, the general collider detectors cannot be used to find particles with an electric charge smaller than 1/3 due to the uncertainty in trace reconstruction (Perl, 2008;Perl et al, 2009). The searches for its impinging on the earth due to the cosmic rays or halo particles have been sensitive only to the smallest charges of 1/5 (Perl et al, 2001;Ambrosio et al, 2000). The bulk matter and sea water searches (only with integer charges) (Smith and Bennett, 1979; and so forth, up to Chuzhoy and Kolb, 2009) have a similar sensitivity (Kim et al, 2007;Lee et al, 2002;Perl et al, 2000;.…”

Section: Stable Anomalously-charged Scalarsmentioning

confidence: 99%

A Simple Model of Gauged Lepton and Baryon Charges

Dong¹,

Long²

2015

Physics International

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We propose a simple extension of the standard model with lepton and baryon numbers gauged by introducing only two leptoquarks (j) to the fermion content. As natural consequences of the anomaly cancelation, the right-handed neutrinos present and the number of observed fermion families equals to the number of fundamental colors, which is three. To avoid stabilized colored-leptoquarks, two scalar doublets φ, χ are introduced which couple the leptoquarks to ordinary quarks. The new gauge bosonsZ gain masses via the vacuum values of scalars S L , S B which are only charged under the U(1) L , U(1) B symmetries, respectively. Furthermore, due to the spontaneous symmetry breaking of these charges, the neutrinos obtain small masses via type I seesaw mechanism while the baryogenesis can be generated in several cases. Constraints coming from flavor changing, stabilization of anomalously electriccharged scalars and collision phenomenology are also obtained.

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Section: Stable Anomalously-charged Scalarsmentioning

confidence: 99%

A Simple Model of Gauged Lepton and Baryon Charges

Dong¹,

Long²

2015

Physics International

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“…The most recent review of such searches is part of a more general review paper on searches for stable, massive elementary particles [21].…”

Section: Scientific Status Of Fractional Charge Searchesmentioning

confidence: 99%

“…The only reviews of these searches are the brief one in [21] and old reviews [29,30]. Examples of recent searches in colliders are the 2003 search using proton-antiproton collisions at 1800 GeV [31] and the 1998 search using electron-positron collisions at 130 GeV to 183 GeV [32].…”

Section: Scientific Status Of Fractional Charge Searchesmentioning

confidence: 99%

Automated electric charge measurements of fluid microdrops using the Millikan method

Lee¹,

Halyo²,

Lee³

et al. 2004

Metrologia

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Automated measurements of the electric charge of fluid microdrops precise to up to 0.016 of an electron charge have been made using machine-vision systems to observe the motion of fluid microdrops in air under the influence of an oscillating electric field. The fluid drop diameters have ranged from 7 to 25 µm with smaller diameter drops being measured to higher precision. The experimental runs performed for the purpose of attempting to find isolated fractionally electrically charged particles have measured the charges of tens of millions of fluid microdrops using piezoelectrically driven drop-on-demand inkjet-like droplet ejectors as fluid drop sources.

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“…Variations of the method were successfully used in searches for free fractional charge particles in pure liquids or liquid suspensions of powdered bulk materials [26,27,28,29,30,31,32,33]. However, implementation of this method "as-it-is" is restricted to elements and substances whose melting temperature does not significantly exceed the operational temperature of the dropper's piezoelectric transducer [34].…”

Section: Introductionmentioning

confidence: 99%

Production of dry powder clots using a piezoelectric drop generator

Yashchuk

Sushkov

Budker

et al. 2002

Review of Scientific Instruments

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We have demonstrated that piezoelectrically driven, squeeze mode, tubular reservoir liquid drop generation, originally developed as a "drop-on-demand" method for ejection of microdrops of pure liquid or liquid suspensions of powdered bulk materials, can successfully operate with dry powder. Spherical silver powder with maximum particle diameter of 20 µm (-635 mesh) was loaded into and ejected from a 100 µm orifice glass dropper with flat piezoelectric disk driver.Time of flight experiments were performed to optimize the dropper operation parameters and to determine the size and velocity of the ejected particles. It was found that at certain values of the amplitude, duration, and repetition rate of the voltage pulses applied to the dropper piezoelectric disk, one can produce ejection of powder clots of a stable size, comparable with the dropper orifice diameter.In contrast to the dropper operation with a liquid, in the case of silver powder, a clot is not ejected at each high voltage pulse, but quasi-periodically with an interval corresponding to thousands of pulses. The application of the dry powder clot generation technique for injection of atoms into helium buffer gas at cryogenic temperatures is discussed.

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The Search for Stable, Massive, Elementary Particles

Cited by 64 publications

References 81 publications

A Simple Model of Gauged Lepton and Baryon Charges

A Simple Model of Gauged Lepton and Baryon Charges

Automated electric charge measurements of fluid microdrops using the Millikan method

Production of dry powder clots using a piezoelectric drop generator

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