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PHYS 5326 – Lecture #19

PHYS 5326 – Lecture #19. Monday, Apr. 23, 2007 Dr. Jae Yu. Higgs Search Strategy Higgs Search Channels Backgrounds to Higgs Searches Requirement on Experiments for Higgs Searches. Announcements. Homeworks Please be sure to submit all yet-to-be-submitted homework by Monday, May 7

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PHYS 5326 – Lecture #19

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  1. PHYS 5326 – Lecture #19 Monday, Apr. 23, 2007 Dr. JaeYu • Higgs Search Strategy • Higgs Search Channels • Backgrounds to Higgs Searches • Requirement on Experiments for Higgs Searches PHYS 5326, Spring 2007 Jae Yu

  2. Announcements • Homeworks • Please be sure to submit all yet-to-be-submitted homework by Monday, May 7 • Project presentations • Will have 20+10 min presentation each in the class, Wednesday, May 2 • Project reports • Must be submitted by Monday, May 7 PHYS 5326, Spring 2007 Jae Yu

  3. Write Up Requirements and Evaluation • Due date: 1pm, Monday, May 7 to CPB342 • Requirements • Professionally prepared in MS words • No spelling or grammar mistakes • The style of the write up should be unified so that it looks like written by one person • All contents on the template and more should be contained in the write up • Plots, diagrams and photos should be added w/ appropriate figure captions numbered in order of appearance. The captions should go at the bottom of the figure. • References must be indicated throughout the text in order of appearance. They must be properly matched in the list of bibliography at the end of the document. • Tables must be added and numbered in order of appearance. The caption should go on top of the table. • Key evaluation points • Quality of the document including the quality of the result– 50% • Content and organization of the document – 10 % • Satisfaction of the above requirements – 15% • Thoughtfulness, usefulness and relevance of contents of the document – 25% PHYS 5326, Spring 2007 Jae Yu

  4. Presentation Requirements • Requirements • Professionally prepared using power points • Need your presentations 30 min prior to the class via e-mail • Each presentation must be 23min (presentation) + 7min (question and answer) • Must have the following components: • General Introduction • Motivation • Apparatus • Data analysis and samples • Backgrounds and their estimate • Results, including uncertainties • Conclusions and prospects • Key evaluation points – 25% each • Quality of results included in the slides • Content and organization of the slides • Knowledge on presentation material – answers to questions • Manner of presentation PHYS 5326, Spring 2007 Jae Yu

  5. Higgs Particles • What are the Higgs particles we are looking for? • Standard Model Higgs: Single neutral scalar • MSSM Higgs: Five scalar and pseudoscalar particles • h0, H0, H+/- and A0 • Higgs in Other Models • What are the most distinct characteristics of Higgs particles? • In both SM and MSSM, the Higgs particles interact with fermions through Yukawa coupling whose strength mostly is set by the fermion masses. PHYS 5326, Spring 2007 Jae Yu

  6. Search Strategy • What are the best ways of discovering Higgs? • Make assumptions in Higgs mass • Study the branching ratios • Study the most identifiable final states • Choose the channels w/ smallest background • Study ways to increase number of recorded Higgs • Accelerator dependent • Smarter triggers • Identify and Implement detector improvements that are needed • Precision measurements for Higgs properties • To distinguish SM and SUSY model Higgs PHYS 5326, Spring 2007 Jae Yu

  7. MH=130 GeV SM Higgs Branching Ratios PHYS 5326, Spring 2007 Jae Yu

  8. Higgs Production Processes at Hadron Colliders Gluon fusion: WW, ZZ Fusion: Higgs-strahlung off W,Z: Higgs Bremsstrahlung off top: PHYS 5326, Spring 2007 Jae Yu

  9. MH=130 GeV Hadron Collider SM Higgs Production s PHYS 5326, Spring 2007 Jae Yu

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