• Impossible electric fields examples?

    Updated: 2012-11-30 17:43:51
    I was trying to think of more impossible electric fields than my book has. I understand it is anything that breaks the rule that the path integral is zero. One example is a circular field. I was...

  • Dielectric Sphere in Time Varying Field

    Updated: 2012-11-30 17:43:49
    Hi, I'm interested in how a dielectric sphere effects a (spatially) uniform time varying field. I'm sure I'm not the first to inquire about this very topic. Could anyone direct me to a...

  • Pertinent question regarding time traveling

    Updated: 2012-11-30 17:25:31
    Suppose I traveled back in time 10 seconds. As the Earth is revolving around the sun at a great speed, I would end up in outer space as the earth 10 seconds ago hasn't yet reached my actual position....

  • General questions about electromagnetism.

    Updated: 2012-11-30 17:00:11
    I was wondering about some basic concepts of electromagnetism. Firstly, resistance is kind of like the measure of obstruction in a conducting material; right? So maybe the atomic properties of the...

  • Nature of Inertia and the Emptiness of Space

    Updated: 2012-11-30 16:28:59
    While this may seem like a silly question, I had difficulty answering it completely. "If space is a vacuum, why aren't we somewhere else already?" If it is truly empty, devoid of any substance...

  • how many tree-levels in various QED processes

    Updated: 2012-11-30 16:15:22
    Why do Compton scattering, pair annihilation, Moller scattering and Bhabba scattering have two tree-level Feynman graphs to sum over, whereas electron-positron to muon-antimuon scattering and...

  • qns on euler-lagrangian equation

    Updated: 2012-11-30 15:57:11
    I find it hard to undestand the various notation used for the equation. Am i wrong to understand the equation as finding the maxima or the minima of an function? However, the terms like functional...

  • Physics beyond the Standard Model Wikipedia the free encyclopedia

    Updated: 2012-11-29 01:35:03
    , Physics beyond the Standard Model From Wikipedia , the free encyclopedia   (Redirected from New Physics Jump to : navigation search Beyond the Standard Model Simulated Large Hadron Collider CMS particle detector data depicting a Higgs boson produced by colliding protons decaying into hadron jets and electrons Standard Model Evidence Hierarchy problem Dark matter Cosmological constant problem Strong CP problem Neutrino oscillation Theories Technicolor Kaluza–Klein theory Grand Unified Theory Theory of everything String theory Superfluid vacuum theory Supersymmetry MSSM Superstring theory Supergravity Quantum gravity String theory Loop quantum gravity Causal dynamical triangulation Canonical quantum gravity Superfluid vacuum theory Experiments Gran Sasso INO LHC SNO Super-K Tevatron v

  • Large Hadron Collider Wikipedia the free encyclopedia

    Updated: 2012-11-29 01:35:02
    , Large Hadron Collider From Wikipedia , the free encyclopedia   (Redirected from Lhc Jump to : navigation search LHC redirects here . For other uses , see LHC disambiguation Coordinates 46°14′N 06°03′E ï» ï» 46.233°N 6.05°E ï» 46.233 6.05 Beyond the Standard Model Simulated Large Hadron Collider CMS particle detector data depicting a Higgs boson produced by colliding protons decaying into hadron jets and electrons Standard Model Evidence Hierarchy problem Dark matter Cosmological constant problem Strong CP problem Neutrino oscillation Theories Technicolor Kaluza–Klein theory Grand Unified Theory Theory of everything String theory Superfluid vacuum theory Supersymmetry MSSM Superstring theory Supergravity Quantum gravity String theory Loop quantum gravity Causal dynamical

  • “Oddball” Galaxy Contains the Biggest Black Hole Yet

    Updated: 2012-11-28 19:24:58
    Image of lenticular galaxy NGC 1277 taken with Hubble Space Telescope. (NASA/ESA/Andrew C. Fabian) It’s thought that at the heart of most if not every spiral galaxy (as well as some dwarf galaxies) there’s a supermassive black hole, by definition containing enormous amounts of mass — hundreds of millions, even billions of times the mass [...]

  • CERN in a nutshell

    Updated: 2012-11-28 17:30:48
    Home Sitemap Contact us this site all CERN CERN European Organization for Nuclear Research About us About us Science Research The LHC People CERN's mission CERN's structure The name CERN A global endeavour History highlights Nobel Prizes Why fundamental science Basic science in a competitive world The use of basic science Physics for health Where the web was born How the web began How the web works The first website : info.cern.ch CERN in a nutshell CERN , the European Organization for Nuclear Research is one of the world's largest and most respected centres for scientific research . Its business is fundamental physics , finding out what the Universe is made of and how it works . At CERN , the world's largest and most complex scientific instruments are used to study the basic constituents

  • CERN Education

    Updated: 2012-11-28 17:30:47
    Home Contact us CERN Home this site All CERN CERN Education Teacher Programmes Teaching Resources Visit CERN High School Teacher Programme Teacher Programmes Keep up-to-date with the latest developments in particle physics and related areas , and experience a dynamic , international research environment . CERN offers you the possibility to participate in special programmes for teachers and meet with teaching colleagues from your country or from all over . Europe The High School Teacher Programme is a comprehensive international course held in English , aimed at teachers who would like to spend the first three weeks of July at CERN . The next session will take place from 30 June to 20 July 2013. The National Teacher Programmes are held in the mother tongue language of the participants from

  • Visit CERN

    Updated: 2012-11-28 17:30:47
    Home Sitemap Contact us this site CERN en Français CERN European Organization for Nuclear Research Outreach Visit CERN Globe Exhibitions Guided Tours Travelling exhibitions Events Archives Contacts Home Guided tours for groups Guided tours for individuals Practical information Frequently asked questions Visit CERN CERN welcomes the general public to visit and tour its exhibitions , experimental areas and other facilities . The admission is free . The permanent exhibition Universe of particles and the Microcosm exhibition can be visited from Monday to Saturdays from 10h00-17h00, with no reservation needed . Visitor groups who book in advance can also enjoy a guided tour of some of the surface installations of CERN's experimental areas and learn about the fundamental research done at the

  • Visiter le CERN

    Updated: 2012-11-28 17:30:47
    Accueil Plan du site Nous contacter dans ce site CERN in English CERN European Organization for Nuclear Research Outreach Visiter le CERN Globe Expositions Visites guidées Expositions itinérantes Evénements Archives Contacts Accueil Visites guidées pour les groupes Visites guidées individuelles Informations pratiques Questions fréquentes Visiter le CERN Le CERN accueille le grand public pour lui faire visiter ses expositions , ses installations en surface et les autres points d'intérêt . Les visites du CERN sont gratuites et ouvertes à tous . L'exposition permanente Univers de particules ou l'exposition Microcosm peut être visitées du lundi au samedi entre 10h00 et 18h00, sans réservation . Pour les groupes ayant réservé , un tour guidé permet d'explorer des sites expérimentaux en surface

  • Contributing to an LHC experiment, no transatlantic travel required

    Updated: 2012-11-26 15:10:30
    Physicist Sam Hewamanage woke up, got ready and made his usual 15-minute drive to work. He parked his car, walked inside and sat at his workstation before digging into his primary task for the day: monitoring a particle detector located 100 meters underground on the border of Switzerland and France. Hewamanage (pictured below) doesn’t live in Europe. He lives in Batavia, Ill., just outside of Chicago. But he can work on the CMS experiment at the Large Hadron Collider as if he were on the CERN campus, thanks to the Remote Operations Center at Fermilab.

  • Postdoctoral Positions in Geometric Analysis and Gravitation at the AEI, Potsdam, Germany

    Updated: 2012-11-23 09:54:18
    The Max Planck Institute for Gravitational Physics (Albert Einstein Institute) will fill research positions in the areas General Relativity and Cosmology Geometric Analysis Geometric Measure Theory Numerical General Relativity The division of Geometric Analysis and Gravitation includes research groups by U. Menne and O. Rinne. Research programs concern the mathematical problems of general relativity and related physical theories, and are based [...]

  • HCP 2012 Higgs discussion YouTube

    Updated: 2012-11-22 18:18:58
    Advertisement

  • New CQG focus section: Non-astrophysical numerical relativity

    Updated: 2012-11-22 14:34:45
    Dear Colleagues, I am very pleased to bring you this focus section on ‘Non-Astrophysical Numerical Relativity’ guest edited by David Garfinkle and Luis Lehner: http://j.mp/10tV85m This focus section covers some of the non-astrophysical applications of numerical relativity, with an emphasis on recent uses of numerical relativity in high energy physics and quantum gravity. I hope that you will [...]

  • ESA/ESTEC Research Fellowship in Fundamental Physics

    Updated: 2012-11-22 13:05:31
    The European Space Agency’s Advanced Concepts Team (ACT) is looking for highly motivated young researchers in the area of fundamental physics, with good analytical and communicational skills and an excellent aptitude for teamwork. The candidate should hold a degree in Physics, Mathematics or equivalent. He or she should also have completed (or be about to complete) [...]

  • Bad News for Supersymmetry?

    Updated: 2012-11-22 02:17:58
    Questioning the Foundations FQXi's 2012 Essay Contest Search FQXi show search help You can use the terms and or in your search or phrases are resolved first , then the and phrases . For example , searching for black hole and galaxy or universe will find articles that have the phrase black hole in them and also have either galaxy or universe in them . Please note that other search syntax like quote marks , hyphens , etc . are not currently supported . When you view web pages with matches to your search , the terms you searched for will be highlighted in yellow . hide search help Forum Home Introduction Terms of Use Order posts : by chronological order most recent first Posts by the blogger are highlighted in orange posts by FQXi Members are highlighted in . blue By using the FQXi Forum ,

  • Fermilab's first physics slam a smash hit

    Updated: 2012-11-21 13:58:48
    On Friday night, Nov. 16, about 1000 people came out to Fermilab to see five physicists duke it out... with science. The occasion was the laboratory's first ever physics slam. A physics slam is kind of like a poetry slam—the five contestants were given 12 minutes each to explain a complex particle physics concept to an auditorium filled with laymen. And they had to do it in the most entertaining way they could, because audience applause determined the winner.

  • Scrutinizing the Cosmological Constant Problem

    Updated: 2012-11-21 01:42:20
    Normally I do my best to ignore claims to have figured out the vacuum energy problem. There’s an endless number of them, mostly looking pretty dubious, and the world is full of people much more expert on the subject than … Continue reading →

  • Twitter sethzenz ParticleOfTheDay Higgs boson

    Updated: 2012-11-20 18:48:48
    : : . Search query Search : Language English Bahasa Indonesia Bahasa Melayu Dansk Deutsch Español Euskara Filipino Italiano Magyar Nederlands Norsk Polski Português Suomi Svenska Türkçe català français ČeÅ tina ΕλλΠνικά Русский Українська мова Ö´×‘Ö°×¨Ö´× ª اردو العربية فارسی हठन्दी ภาษาไทย 日本語 简体中文 繁體中文 한국어 Have an account Sign in New to Twitter Join Today Username or email Password Remember me Sign in Forgot password Already using Twitter via text message Close Embed this Tweet Add this Tweet to your website by copying the code below . Learn more HTML Shortcode Link Hmm , there was a problem reaching the server . Try again Alignment None Left Right Center Control position and text

  • Web Tour

    Updated: 2012-11-20 00:00:00
    Launch tour »

  • Arrow of time prefers to point forward

    Updated: 2012-11-19 18:00:00
    Time ceaselessly speeds onward in our everyday experience, never taking so much as half a step backward. Now, thanks to experimental results from the BaBar collaboration, researchers can be sure that the same is also true for single, isolated particles. Time is indeed asymmetric, even on exceedingly small scales.

  • Physics of Turkey

    Updated: 2012-11-18 22:43:39
    It's that time of year. Americans are ramping up for our Thanksgiving holiday and, all too often, that involves an overly-dry dead bird as the centerpiece of the meal. Fortunately, though, some application of thermodynamics can lead to a roasted turkey that is properly heated without being all dried out. You can learn some more about this in our annual favorite article: The Physics of Turkey....Read Full Post

  • Postdoc in Quantum Gravity at the Radboud University Nijmegen, The Netherlands

    Updated: 2012-11-16 10:09:19
    A postdoctoral position in quantum gravity will become available in the group headed by Prof. Renate Loll at the Institute for Mathematics, Astrophysics and Particle Physics (IMAPP) of the Radboud University Nijmegen, starting in autumn of 2013. Applicants should have a background in quantum gravity or related areas, and an active interest in contributing to [...]

  • Unraveling Paradoxes (November 16, 2012 podcast)

    Updated: 2012-11-16 05:00:00
    Extended interview with Jim Al-Khalili, who discusses his new book, covering classic conundrums from the history of physics and what they can still teach us today.

  • Physics never sleeps

    Updated: 2012-11-16 00:00:00
    ATLAS Control Room, Meyrin, Switzerland   11:30 p.m., Nov. 4 It is half an hour into the night shift at the control room for the Large Hadron Collider’s ATLAS detector, and there is nothing to do. The LHC is not running. “We can’t do anything. We just have to wait,” says shift supervisor Adrian Vogel.

  • New particle-like structure confirmed at the LHC

    Updated: 2012-11-15 19:46:22
    Scientists on an experiment at the Large Hadron Collider confirmed this week the existence of a particle-like structure first observed at the LHC’s predecessor, the Tevatron. Members of the CMS collaboration announced on Nov. 14 that they had spotted a curious object, dubbed Y(4140), that the CDF experiment had detected in March 2009. “We don’t know what it is,” says Vincenzo Chiochia, co-convener of the B physics group for CMS. “We observe a structure consistent with previous observations from the Tevatron.”

  • hep-ex 0703020 Evidence for D0-anti-D0 Mixing

    Updated: 2012-11-15 12:06:47
    Cornell University Library We gratefully acknowledge supporting institutions arXiv.org hep-ex arXiv:hep-ex 0703020 Search or Article-id Help Advanced search All papers Titles Authors Abstracts Full text Help pages Full-text : links : Download PDF PostScript Other formats Current browse : context hep-ex next new recent 0703 References Citations INSPIRE HEP refers to cited by NASA ADS 2 blog links what is this Bookmark what is this High Energy Physics Experiment : Title Evidence for D0-anti-D0 Mixing : Authors The BABAR Collaboration B . Aubert et al Submitted on 12 Mar 2007 : Abstract We present evidence for D0-anti-D0 mixing in D0 K+pi- decays from 384 fb^{-1 of e+e- colliding-beam data recorded near sqrt(s 10.6 GeV with the BaBar detector at the PEP-II storage rings at SLAC . We find the

  • CERN Dark secrets of the Universe

    Updated: 2012-11-14 14:31:18
    Home Sitemap Contact us this site all CERN CERN European Organization for Nuclear Research Science About us Science Research The LHC People NASA , ESA and R . Massey Caltech Recipe for a Universe The standard package Towards a superforce Missing Higgs Antimatter detectives Clues to the early Universe Dark secrets of the Universe Loose ends Secret dimensions Glossary Dark secrets of the Universe It's perhaps natural that we don't know much about how the Universe was created after all , we were never there ourselves . But it's surprising to realise that when it comes to the Universe today , we don't necessarily have a much better knowledge of what is out there . In fact , astronomers and physicists have found that all we see in the Universe planets , stars , galaxies accounts for only a tiny

  • Postdoc position in mathematical or numerical relativity at the University of Vienna

    Updated: 2012-11-13 14:34:30
    The Gravitational Physics group of the Department of Physics of University of Vienna (see http://gravity.univie.ac.at/) is seeking to fill a post-doctoral position (Universitätsassistent/in) in the field of  mathematical general relativity and/or numerical general relativity; in the latter case candidates with strong interest in rigorous aspects of numerical analysis will be sought. The appointment will be up to four years, according to [...]

  • Faculty and Postdoc Positions in Theoretical Physics at Fudan University

    Updated: 2012-11-13 03:10:33
    The Department of Physics at Fudan University (Shanghai, China) have faculty and postdoc position openings in the areas of theoretical physics, including quantum field/string theory, particle theory/phenomenology/astrophysics and cosmology. The faculty positions can be either tenure-tracked at the level of associate professor or with tenure at the level of full professor, depending on [...]

  • Quantum Mechanics, Reality, & You at Philcon

    Updated: 2012-11-13 00:16:03
    Did my Quantum Mechanics, Reality, & You talk at Philcon this last weekend.  Had a very energetic & engaged audience. My thanks to Ed Bishop, Tom Purdom, Ron Bushyager, Ferne Welch, Walt Mankowski, & lots of others for great questions! Did five panels as well.  Full schedule: Fri 8:00 PM in Plaza III (Three) (1 [...]

  • BOSS collaboration measures expansion of the universe 11 billion years ago

    Updated: 2012-11-13 00:00:00
    The universe is expanding, with every galaxy speeding away from all others at an ever-increasing rate. But it hasn’t always been that way. Eleven billion years ago, the speed of that expansion was beginning to slow as gravity pulled galaxies in toward one another. That was before dark energy came into play.

  • Lead-proton collisions yield surprising effect in CMS experiment

    Updated: 2012-11-08 20:51:16
    <div class="field-item even"CMS physicists observed an unusual trend in the data they collected in September when they collided protons with lead ions instead of other protons. Particles produced in collisions tend to travel in opposite directions, but in one in roughly every 2 million collisions, the physicists saw particles travel in a common direction. Seemingly unrelated particles located apart from one another in the detector also had a tendency to travel in a common direction.

  • Social scientists: Far-flung physicists meet face-to-face

    Updated: 2012-11-07 18:00:00
    More than 300 scientists who study the sky in the high-powered light of gamma rays came together last week for five days of presentations, meetings and the chance to compare notes at the Fourth International Fermi Symposium. Acronyms flew thick and fast: SNR (supernova remnant), TGF (terrestrial gamma-ray flashes) and AGN (active galactic nucleus) were only a few of the TLAs (three-letter acronyms) to be heard.

  • Read the latest CQG Highlights for free

    Updated: 2012-11-06 15:17:55
    Dear Colleagues, It is my pleasure to announce the publication of Classical and Quantum Gravity’s Highlights of 2011-2012: http://j.mp/vrrUyh . These articles were selected by the Editorial Board of Classical and Quantum Gravity (CQG) and represent some of the most interesting recent work in gravitational physics. Articles featured in past CQG Highlights have been highly cited and are [...]

  • Nature and the ArXiv Revisited

    Updated: 2012-11-05 21:10:00
    : skip to main skip to sidebar Monday , November 05, 2012 Nature and the ArXiv Revisited Almost one year ago , several physicists from Imperial College London and the University of London released one of the most highly-praised papers on the foundations of quantum mechanics in recent years . Essentially , the researchers had provided strong evidence that the quantum state is , in fact , real . Furthermore , this suggested that the quantum state is not merely a reflection of an observer's knowledge of a system , as some physicists and philosophers have . argued Image courtesy Cornell University Library Arxiv.org Terry Rudolph , one of the authors of the paper , decided to submit his paper to perhaps the most prominent interdisciplinary scientific journal : Nature Additionally , he posted

  • Postdoc Position in Quantum Gravity at the Institute for Quantum Gravity, Erlangen, Germany

    Updated: 2012-11-04 21:18:51
    In autumn 2013, at least one postdoctoral position in the field of non perturbative and background independent quantum gravity and related will be available at the Institute for Quantum Gravity (IQG), chair for Theoretical Physics III of the Friedrich Alexander University (FAU) Erlangen-Nürnberg, Germany. The position is for two years with a possibility of extension [...]

Current Feed Items | Previous Months Items

Oct 2012 | Sep 2012 | Aug 2012 | Jul 2012 | Jun 2012 | May 2012