Improved search for elementary particles with fractional electric charge.
نویسندگان
چکیده
The SLAC Quark Search Group has demonstrated successful operation of a low cost, high mass throughput Millikan apparatus designed to search for fractionally charged particles. About six million silicone oil drops were measured with no evidence of fractional charges. A second experiment is under construction with 100 times greater throughput which will utilize optimized search fluids. Invited talk presented at 1996 Meeting of the Division of Particles and Fields of the American Physical Society Minneapolis, Minnesota August 10-15, 1996 * Work supported by Department of Energy contract DE–AC03–76SF00515. AN IMPROVED SEARCH FOR ELEMENTARY PARTICLES WITH FRACTIONAL ELECTRIC CHARGE
منابع مشابه
Search for free fractional electric charge elementary particles using an automated millikan oil drop technique
We have carried out a direct search in bulk matter for free fractional electric charge elementary particles using the largest mass single sample ever studied-about 17.4 mg of silicone oil. The search used an improved and highly automated Millikan oil drop technique. No evidence for fractional charge particles was found. The concentration of particles with fractional charge more than 0. 16e ( e ...
متن کاملLarge Bulk Matter Search for Fractional Charge Particles
We have carried out the largest search for stable particles with fractional electric charge, based on an oil drop method that incorporates a horizontal electric field and upward air flow. No evidence for such particles was found, giving a 95% C.L. upper limit of 1.15 × 10 particles per nucleon on the abundance of fractional charge particles in silicone oil for 0.18e ≤ |Qresidual| ≤ 0.82e.
متن کاملبررسی اثرشارژ الکتریکی قطرات آب بر راندمان اسکرابر مه پاش در حذف ذرات فلدسپار
Background and aims: One of the modern ways introduced nowadays for increasing the collection efficiency of particulate, is the use of electric charge in wet scrubbers. These systems can be used in places in which scrubbers are suitable for contaminant collection. In fact, this system only increases the collection efficiency, and it is not a new technology for contaminant collection. Method...
متن کاملThe Search for Stable , Massive , Elementary Particles ∗
In this paper we review the experimental and observational searches for stable, massive, elementary particles other than the electron and proton. The particles may be neutral, may have unit charge or may have fractional charge. They may interact through the strong, electromagnetic, weak or gravitational forces or through some unknown force. The purpose of this review is to provide a guide for f...
متن کاملElectric Dipole Moments of Fundamental Particles
The search for electric dipole moments (EDM) of fundamental particles started approximately fifty years with Ramsey’s search for a neutron EDM. Even though the techniques have been improved and the sensitivities has reached an unprecedented small level no EDM of a fundamental particle has been observed so far. Non-the-less EDM experiments have put strict limits and constrained the parameter spa...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Physical review. D, Particles and fields
دوره 53 11 شماره
صفحات -
تاریخ انتشار 1996