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b-Quark Physics with the LEP Collider The Development of Experimental Techniques for b-Quark Studies from Z^0-Decay

Barker Gary John
Heftet / 2012 / Engelsk

Produktdetaljer

ISBN
9783642263507
Publisert
2012-06-28
Utgiver
Springer-Verlag Berlin and Heidelberg GmbH & Co. KG
Høyde
235 mm
Bredde
155 mm
Aldersnivå
Research, P, 06
Språk
Product language
Engelsk
Format
Product format
Heftet
Antall sider
11

Forfatter
Barker Gary John

b-Quark Physics with the LEP Collider The Development of Experimental Techniques for b-Quark Studies from Z^0-Decay

Barker Gary John
Heftet / 2012 / Engelsk
Barker Gary John
Heftet / 2012 / Engelsk
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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 ...
Les mer
With an emphasis firmly on telling the story from an experimental viewpoint, this book reviews the impact that the LEP experiments have had on the subject of b-quark physics. Highlights of the final b-physics results from the LEP collaborations are reviewed.
Les mer

The book reviews the unexpected impact that the LEP experiments have had on the subject of b-quark physics. The emphasis is firmly on telling the story from an experimental viewpoint. Aspects of the detectors that were essential for the reconstruction of b-hadrons are highlighted, especially the role played by silicon strip detectors and particle identification methods. The importance of solving practical issues such as detector alignment and track reconstruction to fully realize the reconstruction potential of the detectors is demonstrated along with various examples of potential problems when these aspects are not well controlled. Barker details new ideas and analysis techniques that evolved during the years of LEP running so that the information is useful to new researchers or those putting together plans for future b-physics experiments. Highlights of the final b-physics results from the LEP collaborations are reviewed in the context of results from other experiments around the world and with respect to what we learn about the Standard Model of Particle Physics.

Les mer
Comprehensive description of experimental methods Includes supplementary material: sn.pub/extras

Relaterte produkter

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 ...
Les mer
With an emphasis firmly on telling the story from an experimental viewpoint, this book reviews the impact that the LEP experiments have had on the subject of b-quark physics. Highlights of the final b-physics results from the LEP collaborations are reviewed.
Les mer

The book reviews the unexpected impact that the LEP experiments have had on the subject of b-quark physics. The emphasis is firmly on telling the story from an experimental viewpoint. Aspects of the detectors that were essential for the reconstruction of b-hadrons are highlighted, especially the role played by silicon strip detectors and particle identification methods. The importance of solving practical issues such as detector alignment and track reconstruction to fully realize the reconstruction potential of the detectors is demonstrated along with various examples of potential problems when these aspects are not well controlled. Barker details new ideas and analysis techniques that evolved during the years of LEP running so that the information is useful to new researchers or those putting together plans for future b-physics experiments. Highlights of the final b-physics results from the LEP collaborations are reviewed in the context of results from other experiments around the world and with respect to what we learn about the Standard Model of Particle Physics.

Les mer
Comprehensive description of experimental methods Includes supplementary material: sn.pub/extras

Produktdetaljer

ISBN
9783642263507
Publisert
2012-06-28
Utgiver
Springer-Verlag Berlin and Heidelberg GmbH & Co. KG
Høyde
235 mm
Bredde
155 mm
Aldersnivå
Research, P, 06
Språk
Product language
Engelsk
Format
Product format
Heftet
Antall sider
11

Forfatter
Barker Gary John

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