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10 Dec 2012 | Achintya Rao | Physics
In the vast particle landscape, there are, to borrow a phrase, known knowns (the Standard Model, for example), unknown unknowns (exotic extensions of the Standard Model and beyond), and those ever-interesting known unknowns. A recent CMS observation...
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22 Nov 2012 | Achintya Rao | Physics
At the Hadron Collider Physics (HCP) Symposium held in Kyoto, Japan on 12–16 November 2012, CMS presented many new results, including updates on the search for the Standard Model (SM) Higgs boson as well as Supersymmetry (SUSY). Several of these...
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30 Oct 2012 | Pedro Vieira De Castro Ferreira Da Silva | Physics
Amongst all known elementary particles, the top quark is peculiar: weighing as much as a Tungsten atom, it completes the so-called 3rd generation of quarks and is the only quark whose properties can be directly measured. Owing to its mass, the top...
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22 Oct 2012 | Wei Li | Physics
CMS has published its first paper on proton-lead (pPb) collisions, describing the observation of a phenomenon that was previously seen first in nucleus-nucleus collisions but also detected by CMS in proton-proton (pp) collisions. The effect is a...
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17 Oct 2012 | Jim Pivarski | Physics
All of the atoms in our bodies are made of electrons, protons and neutrons, and the protons and neutrons can be further broken down into quarks. Fundamentally, then, we are made of only two types of particles: electrons and quarks. But what do these...
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08 Oct 2012 | Achintya Rao | Physics
Our best understanding of the early Universe tells us that a dense medium, known as the quark-gluon plasma (QGP), existed in the first microseconds after the big bang. These early-Universe conditions can be mimicked in particle colliders by smashing...
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13 Aug 2012 | Lucas Taylor | Physics
The Quark Matter 2012 conference, held in Washington DC from 13-18 August 2012, brings together experimental and theoretical experts in the area of heavy-ion physics. This week, the CMS collaboration is presenting many exciting new results using...
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07 Aug 2012 | Lucas Taylor | Physics
31 July 2012, CERN Today CMS submitted for publication, in the Physics Letters B journal, a paper entitled "Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC". The abstract for the paper [get PDF here] reads:...
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09 Jul 2012 | Henning Kirschenmann | Physics
Jets are the experimental signatures of quarks and gluons produced in high-energy processes such as head-on proton-proton collisions. As quarks and gluons have a net colour charge and cannot exist freely due to colour-confinement, they are not...
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07 May 2012 | Alexey Ferapontov | Physics
The search for microscopic black holes at the LHC is motivated by the hierarchy problem — the huge observed difference between the strengths of the electroweak and gravitational forces. The ADD model (Arkani-Hamed, Dimopoulos, and Dvali) offers an...
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02 May 2012 | Achintya Rao | Physics
A measurement of the underlying event (UE) activity in proton-proton collisions at a centre-of-mass energy of 7 TeV is performed using Drell-Yan events in a data sample corresponding to an integrated luminosity of 2.2 fb−1 (inverse femtobarns),...
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27 Apr 2012 | Lucas Taylor | Physics
*/ The CMS experiment has submitted a paper for publication describing the first observation of a new, excited bottom (or beauty) baryon known as the Ξ*b0, with a statistical significance of more than 5 standard deviations (5σ) above the expected...
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