RevModPhys.84.1477】Tests of the standard electroweak model at the energy frontier

RevModPhys.84.1477】Tests of the standard electroweak model at the energy frontier

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Tests of the standard electroweak model at the energy frontier John D. Hobbs * Department of Physics and Astronomy, State University of New York, Stony Brook, New York 11794, USA Mark S. Neubauer and Scott Willenbrock Departmentof Physics, Universityof Illinoisat Urbana-Champaign,Urbana,Illinois, 61801, USA (published 25 October 2012) In this review, tests of standard electroweak (EW) theory at the highest available energies as a precursor to the Large Hadron Collider (LHC) era are summarized. The primary focus is on the published results (as of March 2010) from proton-antiproton collisions at ffiffi s p ¼ 1 : 96 TeV at the Fermilab Tevatron collected using the CDF and D0 detectors. After presenting an overview of the EW sector of the standard model, a summary of experimental tests of EW theory as of March 2010 is provided. These include gauge boson properties and self-couplings, tests of EW physics from the top-quark sector, and searches for the Higgs boson. DOI: 10.1103/RevModPhys.84.1477 PACS numbers: 12.15.Ji, 13.85.Rm, 14.70.Fm, 14.70.Hp CONTENTS I. Introduction 1477 II. Overview 1478 A. Electroweak interactions 1479 B. Electroweak symmetry breaking 1479 III. Electroweak gauge bosons 1479 A. Heavy gauge boson production 1480 1. W and Z cross sections 1480 B. W boson mass 1481 C. W Width 1483 D. Forward-backward asymmetry A FB 1484 E. Dibosons 1486 1. Trilinear gauge couplings 1486 2. 1488 3. 1489 4. WW 1491 5. WZ 1493 6. ZZ 1496 7. WV ( V ¼ W , Z ) 1498 8. VV ( V ¼ W , Z ) 1501 9. Cross section and anomalous TGC summary 1504 IV. Top Quark 1504 A. Top-quark mass 1504 B. W helicity from top-quark decays 1508 C. Single-top production and V tb 1509 V. Higgs Boson 1511 A. Precision electroweak constraints 1511 B. Direct searches 1511 1. WH ! ‘#bb ±nal state 1513 ZH ! ‘‘bb ±nal state 1516 ZH ! ##bb and related ±nal states 1517 ( þ jets and (( þ jets ±nal states 1520 H ! ± 1521 C. Combined limits 1524 VI. SUMMARY AND OUTLOOK 1524 Acknowledgments 1524 References 1524 I. INTRODUCTION The goal of particle physics is to explain the nature of the Universe at its most fundamental level, including the basic constituents of matter and their interactions. The standard model (SM) of particle physics is a quantum ±eld theory based on the SU ð 3 Þ C ² SU ð 2 Þ L ² U ð 1 Þ Y gauge symmetry group which describes the strong, weak, and electromagnetic (EM) interactions among fundamental particles. This theory has been the focus of intense scrutiny by experimental phys- icists, most notably at high-energy particle colliders, over the last three decades. It has been demonstrated to accurately describe fundamental particles and their interactions up to O ð 100 Þ GeV , with the existence of nonzero neutrino masses and mixing being the only known exception. Despite the success of the SM, there are many reasons to believe that the SM is an effective theory which is only valid up to ³ 1 TeV . Some of the shortcomings of the SM will be described in Sec II .
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RevModPhys.84.1477】Tests of the standard electroweak model at the energy frontier

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