| 单词 | lepton |
| 例句 | Quarks and leptons, bluons and charms are assigned to various colors and combinations of plastic bricks. Review | Everything explained — in photos, cartoons and Legos 2017-12-27T05:00:00Z So does this mean that psychologists ought to be paying a lot more attention to quarks and leptons? Evolution and the mind: An author’s response 2012-09-21T22:48:00Z Poor Lenny, the likeness of Malvo with a bad bowl haircut and bandaged forehead who stupidly called Numbers and Wrench “a dink and a lepton.” ArtsBeat: ‘Fargo’ Recap: Boots on the Ground 2014-04-23T03:22:49Z The Amtrak roomette – ugly, ugly, ugly word – is not big in the same way that leptons and quarks are not big. A happy ending to my American tour 2010-10-19T09:57:00Z Turner: As far as we know, the basic building blocks of matter are quarks and leptons; the rules that govern them are described by the quantum field theory called the Standard Model. Where is Physics Headed (and How Soon Do We Get There)? 2023-01-24T05:00:00Z My interest in the topic of lepton flavor universality violations was born. Rule-Breaking Particles Pop Up in Experiments around the World 2022-11-14T05:00:00Z Subatomic particles appear to be breaking a rule called “lepton flavor universality.” Fun Details about the Human Side of Science 2022-10-18T04:00:00Z The leptons fall into three families, implying three conservation laws for three quantum numbers. College Physics for AP Courses 2015-08-12T00:00:00Z Tantalizingly, there are six kinds of quarks and six kinds of leptons. As the Large Hadron Collider Revs Up, Physicists’ Hopes Soar 2022-06-13T04:00:00Z In “The Unseen Universe,” Marcela Carena describes apparent discrepancies between the observed behavior of muons—one of the three types of charged leptons—and calculations based on the Standard Model of particle physics. Readers Respond to the October 2021 Issue 2022-02-20T05:00:00Z On the surface, this quantity is not related to lepton flavor universality, and I didn’t find the measurement very exciting at first. Rule-Breaking Particles Pop Up in Experiments around the World 2022-11-14T05:00:00Z This flouting of what we think we know requires us to think again, to ponder what unknown matter, lepton, quark or boson explains the Muon’s extendable wobble. Poem: ‘Elective Affinities: Ghazal of the Muon’ 2022-02-05T05:00:00Z More recently, a third lepton family was discovered when τ particles were created and observed to decay in a manner similar to muons. College Physics for AP Courses 2015-08-12T00:00:00Z But Dr. Patel and his colleagues have found more electron pairs than muon pairs, violating a principle called lepton universality. As the Large Hadron Collider Revs Up, Physicists’ Hopes Soar 2022-06-13T04:00:00Z If the discrepancies for muons are real, I would also expect discrepancies for tau leptons. Readers Respond to the October 2021 Issue 2022-02-20T05:00:00Z From then on, the evidence for lepton flavor universality violation has continued to grow. Rule-Breaking Particles Pop Up in Experiments around the World 2022-11-14T05:00:00Z Another possibility is a new type of particle called a leptoquark—a strange kind of boson that shares properties with quarks as well as leptons such as the muon. Weird Muons May Point to New Particles and Forces of Nature 2021-09-14T04:00:00Z Mesons are hadrons that can decay to leptons and leave no hadrons, which implies that mesons are not conserved in number. College Physics for AP Courses 2015-08-12T00:00:00Z Under the Standard Model—the theory that describes elementary particles and the forces they obey, minus gravity—leptons such as electrons and muons are identical except for their mass. Unexplained Results Intrigue Physicists at World’s Largest Particle Collider 2021-03-25T04:00:00Z Several other explanations for the Muon g-2 results also involve tau leptons, so it is important to think about how we might see something in an experiment with these particles. Readers Respond to the October 2021 Issue 2022-02-20T05:00:00Z To fully understand lepton flavor universality and what violating it means, we first have to review the known constituents of matter at the subatomic scale and the interactions among them—that is, the Standard Model. Rule-Breaking Particles Pop Up in Experiments around the World 2022-11-14T05:00:00Z Similarly, there are six leptons: the electron, muon, tau and the three neutrinos. Why Is There More Matter Than Antimatter? 2019-03-21T04:00:00Z Mesons and leptons have B = 0 so that they can decay to other particles with B = 0 . College Physics for AP Courses 2015-08-12T00:00:00Z “If it’s eventually confirmed experimentally, then there actually is something beyond the Standard Model that treats the lepton flavors differently.” Unexplained Results Intrigue Physicists at World’s Largest Particle Collider 2021-03-25T04:00:00Z Tau leptons are much more unstable than muons and harder to produce in the first place, but one could imagine building a particle accelerator optimized for producing them—a “tau factory”—in the future. Readers Respond to the October 2021 Issue 2022-02-20T05:00:00Z If leptons are not universal—if there are forces that do discriminate among the generations—then something interesting is afoot. Rule-Breaking Particles Pop Up in Experiments around the World 2022-11-14T05:00:00Z Then there’s a collider called a lepton collider which would, well, smash particles called leptons together. CERN wants to build the biggest, baddest particle collider ever 2019-01-15T05:00:00Z Discoveries made since 1963 have required extra quark flavors, which are divided into three families quite analogous to leptons. College Physics for AP Courses 2015-08-12T00:00:00Z What’s worse, the proposed explanations for the leptons’ behavior seem ad hoc and unsatisfying. Lawbreaking Particles May Point to a Previously Unknown Force in the Universe 2017-07-17T04:00:00Z Coincidentally, it would be called the tau lepton. The Tao of Tau 2017-06-27T04:00:00Z So far we have four different indications that lepton flavor universality might not hold true. Rule-Breaking Particles Pop Up in Experiments around the World 2022-11-14T05:00:00Z Another explanation is the existence of a ‘leptoquark’, a boson that would share some properties with both leptons and quarks. Physicists excited by latest LHC anomaly 2017-04-18T04:00:00Z Furthermore, at that time only four leptons were known, two normal and two exotic. College Physics for AP Courses 2015-08-12T00:00:00Z If the various leptons really behave differently, the only explanation would be some previously unrecognized force. Lawbreaking Particles May Point to a Previously Unknown Force in the Universe 2017-07-17T04:00:00Z Electrons, negatively charged particles orbiting the nucleus, are perhaps the most famous leptons. The Tao of Tau 2017-06-27T04:00:00Z During this process the beauty quark turns into a strange quark and produces a pair of leptons—specifically, a lepton and its antimatter partner. Rule-Breaking Particles Pop Up in Experiments around the World 2022-11-14T05:00:00Z ALPHA-2 is equipped with extensive diagnostics for lepton and antiproton plasmas. Observation of the 1S–2S transition in trapped antihydrogen : Nature : Nature Research 2016-12-18T05:00:00Z It was attractive that there would be four quarks and four leptons. College Physics for AP Courses 2015-08-12T00:00:00Z Here “lepton” refers to the class of particles including electrons, muons and taus. Lawbreaking Particles May Point to a Previously Unknown Force in the Universe 2017-07-17T04:00:00Z “Right now the tau protein is probably more famous than the tau lepton, although I’m sure for many years it was the other way around,” Kirschner said. The Tao of Tau 2017-06-27T04:00:00Z Here tau leptons are expected less frequently than muons or electrons because they are heavier. Rule-Breaking Particles Pop Up in Experiments around the World 2022-11-14T05:00:00Z Any experiment at a high energy collider would look for four leptons and measure their mass. Could the Higgs boson have been discovered by accident? 2016-09-18T04:00:00Z We have examined leptons and quarks in some detail. College Physics for AP Courses 2015-08-12T00:00:00Z But the weak force treats all leptons equally. Lawbreaking Particles May Point to a Previously Unknown Force in the Universe 2017-07-17T04:00:00Z Physicists at the LHC and elsewhere say that such a discovery would be the most important in particle physics since at least 1975, when the unexpected tau lepton was discovered. Hints of new LHC particle get slightly stronger 2016-03-16T04:00:00Z They connect a single quark directly to a single lepton: for instance, a lepton could transform into a quark by emitting a leptoquark—unlike any interaction in the Standard Model. Rule-Breaking Particles Pop Up in Experiments around the World 2022-11-14T05:00:00Z A Standard Model principle known as lepton universality says that all leptons should be treated equally by the weak interaction, the fundamental force responsible for radioactive decay. Two Accelerators Find Particles that May Break Known Laws of Physics 2015-09-09T04:00:00Z Figure 33.20 The three types of particles are leptons, quarks, and carrier particles. College Physics for AP Courses 2015-08-12T00:00:00Z The particles' names allude to the fact that on the rare occasions when neutrinos interact with protons or neutrons, they variously produce electrons, muons or tau leptons. Neutrinos found to switch to elusive 'tau' flavour 2015-06-15T04:00:00Z The onetime science-avoider now speaks fluidly about quarks, leptons and bosons. Artist partners with physics lab, water district, cop shop 2014-11-08T05:00:00Z Second, the Z bosons expected at the FCC-ee would produce an unprecedented number of beauty quarks and tau leptons. Rule-Breaking Particles Pop Up in Experiments around the World 2022-11-14T05:00:00Z In the official proposal for the Spear collider, the heavy lepton search was left for last, and allotted just three pages. Martin Perl, Physicist Who Discovered Electron’s Long-Lost Brother, Dies at 87 2014-10-03T04:00:00Z If that happens, then both lepton and baryon conservation would be violated. College Physics for AP Courses 2015-08-12T00:00:00Z At the time, the prevailing belief among scientists was that the physical world included two types of particles known as leptons — electrons and muons — and the associated members of their families. Martin L. Perl, Nobel Prize-winning physicist, dies at 87 Particle physics is a beggar’s banquet of cool terms—gluon, muon, boson, lepton—so quarks have some stiff competition. Top Ten Insanely Great Science Terms 2014-03-13T19:42:20Z If the present hints of lepton universality violation hold up, they could provide long-sought guidance toward a more complete fundamental theory of particle physics. Rule-Breaking Particles Pop Up in Experiments around the World 2022-11-14T05:00:00Z But of course, he won his own Nobel in 1988, “for the neutrino beam method and the demonstration of the doublet structure of the leptons through the discovery of the muon neutrino.” The Higgs Boson and the Nobel: Why We Call It the 'God Particle' 2013-10-09T14:13:00Z Why do leptons have integral charge while quarks have fractional charge? College Physics for AP Courses 2015-08-12T00:00:00Z Clad in long white coats, they spend their days smashing particles together in the hunt for exotic creatures like quarks and squarks, leptons and sleptons -- and the Higgs Boson. Captive particles and Dr. Who show physicists are human too 2013-04-17T16:37:15Z “The Inner Life of Quarks,” by Don Lincoln, describes possible building blocks of quarks and leptons called preons. Readers Respond to "America's Science Problem" 2013-02-22T22:15:00.237Z It is also important to test whether the rates of its decays to the quarks and leptons match the predictions for the SM Higgs boson. [Article] A Particle Consistent with the Higgs Boson Observed with the ATLAS Detector at the Large Hadron Collider 2012-12-20T21:55:01.327Z The leptons from Z decays are, in general, well isolated in the detector; that is, their trajectories are far from the debris of jets or other particles produced in the collision. [Article] A New Boson with a Mass of 125 GeV Observed with the CMS Experiment at the Large Hadron Collider 2012-12-20T21:26:32.063Z Why are there three families of quarks and leptons? College Physics for AP Courses 2015-08-12T00:00:00Z In the case of CMS, the angular distribution of the four leptons is included in the likelihood. [Article] Journey in the Search for the Higgs Boson: The ATLAS and CMS Experiments at the Large Hadron Collider 2012-12-20T21:26:28.033Z Technology aside, the multi-billion-dollar question is who would host the next lepton collider. After the Higgs: The new particle landscape 2012-08-29T17:50:28.943Z Second, I first heard the gamma gamma/4 lepton combination numbers that included the last chunk of data that I mentioned a couple paragraphs up. What Was It Like To Be At CERN On The Day Of The Discovery Of The Higgs Boson? 2012-07-13T15:54:04Z Despite the large particle multiplicity per event from pileup interactions, the overall efficiency for selecting isolated leptons remains very high. [Article] A New Boson with a Mass of 125 GeV Observed with the CMS Experiment at the Large Hadron Collider 2012-12-20T21:26:32.063Z Hadrons are particles that feel the strong nuclear force, whereas leptons are particles that do not. College Physics for AP Courses 2015-08-12T00:00:00Z In much the same way, particles passing through the Higgs field picked up more and more mass, until they became the quarks and leptons and bosons that constitute the stuff of today's cosmos. Best evidence yet found for "God particle:" U.S. physicists 2012-07-03T04:53:24Z Oddone says that it would also be “very difficult” at this time for the United States to contribute much to a lepton collider built elsewhere. After the Higgs: The new particle landscape 2012-08-29T17:50:28.943Z Towards that purpose I study the lepton/hadron separation and track resolution performance of the detector. 30 under 30: A Pilot and Tango Dancer Investigates Nature with a Particle Detector on the International Space Station 2012-06-27T12:45:03.870Z We therefore searched for energetic photons close to these leptons and added their energies when appropriate. [Article] A New Boson with a Mass of 125 GeV Observed with the CMS Experiment at the Large Hadron Collider 2012-12-20T21:26:32.063Z The electron, positron, muons, and neutrinos are examples of leptons, the name meaning low mass. College Physics for AP Courses 2015-08-12T00:00:00Z There are nickel coins of 20, 10 and 5 lepta, copper coins of 10 and 5 lepta. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 4 "Grasshopper" to "Greek Language" 2011-11-28T03:00:19.517Z One of the women of the cabin I had visited followed me to the museum, and naturally held out her hand for "pende lepta." From the Oak to the Olive A Plain record of a Pleasant Journey 2011-11-26T03:00:12.337Z Along with leptons—the electron and its relativesquarks are the building blocks of matter. The Discovery of the Top Quark [From the Archive] 2011-09-29T17:15:06.327Z Several decay channels were explored, including the combination of one τ lepton decaying exclusively into leptons and the other into hadrons. [Article] A New Boson with a Mass of 125 GeV Observed with the CMS Experiment at the Large Hadron Collider 2012-12-20T21:26:32.063Z Table 33.2 lists the characteristics of some of the most important subatomic particles, including the directly observed carrier particles for the electromagnetic and weak nuclear forces, all leptons, and some hadrons. College Physics for AP Courses 2015-08-12T00:00:00Z The monetary unit is the new drachma, equivalent to the franc, and divided into 440 100 lepta or centimes. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 4 "Grasshopper" to "Greek Language" 2011-11-28T03:00:19.517Z Before the letters came, last evening, we heard continual cries of "Pende lepta," betokening the issue of an extra. From the Oak to the Olive A Plain record of a Pleasant Journey 2011-11-26T03:00:12.337Z By contrast, leptons, such as protons and neutrinos, don’t participate in strong interactions. Fermilab Scientists Discover New Particle 2011-07-21T03:30:09Z We selected collisions with four isolated leptons originating from the same vertex, for which the transverse momentum of each muon is at least 5 GeV and of each electron is at least 7 GeV. [Article] A New Boson with a Mass of 125 GeV Observed with the CMS Experiment at the Large Hadron Collider 2012-12-20T21:26:32.063Z All known leptons are listed in the table given above. College Physics for AP Courses 2015-08-12T00:00:00Z The franc is divided into 100 centimes, the lira into 100 centesimi and the drachma into 100 lepta. Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 7 "Fox, George" to "France" 2011-05-15T02:00:07.897Z A lepton is a very small brass Jewish coin worth half a Roman quadrans each, which is worth a quarter of the copper assarion. The World English Bible (WEB): Luke Using the quantum numbers in the table given above, show that strangeness changes by 1, baryon number and charge are conserved, and lepton family numbers are unaffected. College Physics for AP Courses 2015-08-12T00:00:00Z Keep in mind that all leptons seem to be fundamental, whereasno hadrons are fundamental. College Physics for AP Courses 2015-08-12T00:00:00Z So muons are leptons with a family of their own, and conservation of total Lµ also seems to be obeyed in many experiments. College Physics for AP Courses 2015-08-12T00:00:00Z There are three types of fundamental particles—leptons, quarks, and carrier particles. College Physics for AP Courses 2015-08-12T00:00:00Z Verify that charge and lepton family numbers are conserved. College Physics for AP Courses 2015-08-12T00:00:00Z Verify that charge and lepton family numbers are conserved. College Physics for AP Courses 2015-08-12T00:00:00Z Verify that baryon number and charge are conserved, while lepton numbers are unaffected. College Physics for AP Courses 2015-08-12T00:00:00Z In fact, particle experiments have found that lepton family number is not universally conserved, due to neutrino “oscillations,” or transformations of neutrinos from one family type to another. College Physics for AP Courses 2015-08-12T00:00:00Z Verify that baryon number, lepton numbers, and charge are conserved. College Physics for AP Courses 2015-08-12T00:00:00Z On the smallest scale, questions may be about quarks and leptons, fundamental forces, stability of protons, and existence of monopoles. College Physics for AP Courses 2015-08-12T00:00:00Z Will neutrino oscillations violate conservation of the total number of leptons? College Physics for AP Courses 2015-08-12T00:00:00Z |
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