Overview
Theb-physicsresultsfromtheLEPdatasetsexceededallexpectationsinboththe range of topics covered and the precision of measurements that were eventually possible. Thesuccesswasduetoseveralfactorssuchastherapiddevelopmentof silicon-strip vertex detectors, advances in the theoretical description of b-hadrons and not least because of the inventiveness, skill and determination of the expe- mentersperformingthedataanalysis. Inordertoutilisefullytheprecisionofthe newvertexdetectors,carefulcommissioningandeventreconstructionwasneeded. Thistogetherwithnewmethodsandtechniquesofdataanalysis,particularlyinthe areaofinclusiveb-hadronreconstruction,werethekeytoawholehostofmeasu- mentsthatspannedtheentire?eldofb-physics. Theaimofthisbookisnottogiveanotherreviewofb-physicsresults. Instead the focus is on reviewing the main experimental methods that evolved (hardware andsoftware)andthelessonslearntfromsomebodywhowasinvolved?rst-handin theirdevelopmentanduse. Thehopeisthatthisworkwillbothstandasarecordof whatwasachievedwiththeLEPdata,andalsoasareferencesourceofb-physics analysisideasforexperimentersembarkingonprojectsinthefuturee. g. attheLHC oralinearcollider. ResultsfromallfouroftheLEPexperimentsarereportedbutsomebiastowards DELPHIisinevitable,especiallytoillustrategeneralpoints,sinceIamacolla- rationmemberandhaveeasieraccesstomaterial. Iwishtothankmyfriendsand colleaguesoftheDELPHIcollaborationformakingtheprojectsuchasuccess. InadditionIwishtogivespecialthanksto:Prof. Dr. MichaelFeindtwhowasthe instigatorofinclusiveanalysismethodsforb-physicswiththeLEPdata;Prof. Dr ThomasMullerforgivingmetheopportunityandencouragementtowritethisar- cle;Dr. RichardHawkings(OPAL)andDr. ChristianWeiser(DELPHI)forallowing meaccesstosomeunpublishedresultsandforusefuldiscussions. FinallyIwould liketothankthepeopleatSpringer,especiallyUteHeuserforherprofessionalh- dlingoftheprojectandpatiencewithmyregularfailuretomeetdeadlines. UniversityofWarwick,UK GaryJ. Barker September2009 vii Contents 1 b-physics at LEP ...1 1. 1 Introduction ...1 1. 2 TheLEPMachineandExperiments ...3 1. 3 b-PhysicsOverview...4 1. 3. 1 b-QuarkProduction...7 b 1. 3. 2 Forward-BackwardAsymmetry A ...7 FB 1. 3. 3 R ...9 b 1. 3. 4 HeavyQuarkSymmetry...10 1. 3. 5 b-QuarkFragmentation...10 1. 3. 6 b-HadronSpectroscopy ...12 1. 3. 7 b-HadronProductionFractions...13 1. 3. 8 Weakb-QuarkDecay...1 3 1. 4 Combiningb-PhysicsResults...18 1. 4. 1 AveragingofElectroweakHeavyFlavourQuantities...19 1. 4. 2 AveragingofNon-electroweakHeavyFlavourQuantities...20 References ...20 2 Silicon Vertex Detectors and Particle Identi?cation ...23 2. 1 Silicon-StripVertexDetectors ...23 2. 2 ParticleIdenti?cation...29 2. 2. 1 Speci?cIonisationEnergyLoss,dE/dx ...30 ? 2. 2. 2 CerenkovRingImaging ...31 2. 2. 3 OverallDetectorPerformance ...32 References ...34 0 ~ 3 Experience in Reconstructing Z ? bb Events...37 3. 1 ImpactParameterandDecayLength ...37 3. 1. 1 ClusterFinding ...40 3. 1. 2 TrackFittingandPatternRecognition ...41 3. 1. 3 VertexDetectorAlignment...43 3. 1. 4 SingleHitUncertainties...49 3. 1. 5 ResolutionTuning ...
Full Product Details
Author: Gary John Barker
Publisher: Springer-Verlag Berlin and Heidelberg GmbH & Co. KG
Imprint: Springer-Verlag Berlin and Heidelberg GmbH & Co. K
Edition: 2010 ed.
Volume: 236
Dimensions:
Width: 15.50cm
, Height: 1.20cm
, Length: 23.50cm
Weight: 0.970kg
ISBN: 9783642052781
ISBN 10: 3642052789
Pages: 200
Publication Date: 29 May 2010
Audience:
Professional and scholarly
,
Professional & Vocational
Format: Hardback
Publisher's Status: Active
Availability: In Print
This item will be ordered in for you from one of our suppliers. Upon receipt, we will promptly dispatch it out to you. For in store availability, please contact us.
