1 / 21

What is High Energy Physics?

What is High Energy Physics?. High Energy Physics is the study of the most basic particles and forces of nature We explore the smallest scales and the highest energies We want to know what really makes the Universe tick Also known as HEP or as particle physics. The Standard Model.

garrity
Download Presentation

What is High Energy Physics?

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. What is High Energy Physics? • High Energy Physics is the study of the most basic particles and forces of nature • We explore the smallest scales and the highest energies • We want to know what really makes the Universe tick • Also known as HEP or as particle physics

  2. TheStandardModel • The Standard Model represents our best knowledge of everything. • Includes all known particles and forces. • except gravity • By comparing experimental results with predictions from the Standard Model, we test our understanding of the universe • The Standard Model has worked remarkably well for more than 20 years

  3. Forces • Strong nuclear force (QCD) • Electroweak • electromagnetism • weak force • Gravity

  4. ? ? ? ? ? What are the Big Questions to be Answered? What is the origin of mass? Can all of the forces be unified? How do neutrinos oscillate? Why do we see more matter than anti-matter? What is out there that we have never observed? ? ? ? ? ? ? ?

  5. Fermilab • Tevatron • Currently, the world's premier accelerator facility • Proton-Anti-Proton collisions at a center of mass energy of 1.9 trillion electron-volts • Two collider experiments • D0 and CDF • Other physics • neutrino physics, CP-violation, astrophysics and more • Located outside of Chicago • Scientists from all around the world come to Fermilab to do high energy physics

  6. The D0 Experiment • Built around the collision point to detect particles flying out in all directions • Started taking data Spring, 2001 • Already 4x larger than previous data sets • Will take data until 2009 • Upgrade in 2005

  7. Calorimeter • Uranium-Liquid Argon sampling calorimeter Measure energy of hadrons and electrons FSU has a major responsibility for the D calorimeter

  8. Detector in Collision Hall January 2001

  9. D0 Data Taking 24 hours/day 7 days/week for the next 5+ years currently recording a few million events/day

  10. Physics of D0 • Higgs Boson • Supersymmetry • Single Top • Top Quark Properties • Electroweak Physics • QCD - Quantum ChromoDynamics. • Other new particle searches • Leptoquarks, extra dimensions, technicolor, etc.

  11. Recent Publications • “Search for Doubly-charged Higgs Boson Production in the Decay H++H--++-- with the D Detector at s=1.96 TeV”, V. M. Abazov et al., Phys. Rev. Lett 93, 141801 (2004). • “Observation and Properties of the X(3872) Decaying to J/+- in ppbar Collisions at s=1.96 TeV”, V. M. Abazov et al, submitted to PRL • “Search for Supersymmetry with Gauge-Mediated Breaking in Diphoton Events at D”, V. M. Abazov et al, submitted to PRL. • “Measurement of Dijet Azimuthal Decorrelations at Central Rapidities in ppbar Collisions at s=1.96 TeV”, V. M. Abazov et al, submitted to PRL. • “Measurement of the Bs0 Lifetime in the Exclusive Decay Channel Bs0 J/”, V.M. Abazov et al, submitted to PRL.

  12. The DØ Collaboration ~700scientists, students and engineers 82institutions 20countries 130Ph.D. Dissertations 150papers published

  13. FSU Experimental HEP Faculty Yuri Gershstein Todd Adams Sharon Hagopian Susan Blessing S Harrison Prosper Vasken Hagopian Horst Wahl

  14. FSU experimental HEP graduate students José Lazoflores Daekwang Kau Sinjini Sengupta Dan Duggan Suharyo Sumowidagdo Jun Miao

  15. FSU HEP postdocs Norm Buchanan Bill Lee

  16. Examples of FSU graduates • Jeff McDonald (DØ, PhD 1999) • Dissertation: study of single top production • Now at FSU (Research Scientist), was at U. of Pittsburgh • Dan Karmgard (DØ, PhD 1999) • Dissertation: search for leptoquarks • Now at U. Notre Dame (CMS) • Richard Cavanaugh (Aleph, PhD 1999) • Dissertation: measurement of W mass • U. Florida (working on CMS, Grid), was at U. of Heidelberg • Brian Connolly (DØ, PhD 2002) • Dissertation: measurement of top quark mass in hadronic decay • Now at Columbia University (HiRes – cosmic rays)

  17. What do we do? • Hardware • Design, develop, test, and build electronics and detectors • Data-taking (shifts) • Software • Code writing and analysis algorithm development • Data analysis • discovery, measurements, tests • Presentations at meetings, seminars and conferences • Journal publications

  18. What will you do? • First 2 years • Finish coursework • Spend summers at Fermilab learning the experiment • Next several years • Hardware project - calorimeter • Data taking • Programming (C++, Linux, scripting) • Data analysis on your thesis topic • Final year • Presentation and publication of thesis work • Thesis defense • You will spend significant time at Fermilab

  19. Possible Thesis Topics Search for/Discover the Higgs Boson Search for new particles such as Supersymmetry, Technicolor, Leptoquarks, Cold Dark Matter, Extra Dimensions etc. Top Quark Physics QCD Studies including measuring the contents of the proton W mass measurements

  20. FSU People at D0

More Related