We present a study of the e+e−→W*W*νν→tt νν process at center-of-mass energies of 800 GeV and 1 TeV in the context of the TESLA project. An integrated luminosity of 1000 fb−1 is assumed. The analysis includes a full study of signal and backgrounds at generator and detector simulation levels. We find that a Higgs-like resonance H with Standard Model HWW and Htt couplings will be observable in this channel (at the 5σ level) if its mass is in the range 2mt
{"title":"Study of the WW→H→tt̄ process at TESLA","authors":"J. Alcaraz, E. Morales","doi":"10.1063/1.1394380","DOIUrl":"https://doi.org/10.1063/1.1394380","url":null,"abstract":"We present a study of the e+e−→W*W*νν→tt νν process at center-of-mass energies of 800 GeV and 1 TeV in the context of the TESLA project. An integrated luminosity of 1000 fb−1 is assumed. The analysis includes a full study of signal and backgrounds at generator and detector simulation levels. We find that a Higgs-like resonance H with Standard Model HWW and Htt couplings will be observable in this channel (at the 5σ level) if its mass is in the range 2mt<mH<650 GeV. This implies a Higgs-top Yukawa coupling measurement in the same interval with a relative precision better than 10%.","PeriodicalId":325505,"journal":{"name":"Physics and experiments with future linear e+ e- colliders","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125407114","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A brief overview on the tracking detector configuration of the proposed TESLA linear collider detector is given, along with a description of the realistic track reconstruction software that has been developed for the GEANT3-based simulation of this device. The observed track reconstruction performance is discussed. It provides strong support for the expectation that the design requirements imposed by the Physics processes to be studied at a TeV-scale linear collider will indeed be fulfilled.
{"title":"Overall track reconstruction at TESLA","authors":"K. Harder","doi":"10.1063/1.1394439","DOIUrl":"https://doi.org/10.1063/1.1394439","url":null,"abstract":"A brief overview on the tracking detector configuration of the proposed TESLA linear collider detector is given, along with a description of the realistic track reconstruction software that has been developed for the GEANT3-based simulation of this device. The observed track reconstruction performance is discussed. It provides strong support for the expectation that the design requirements imposed by the Physics processes to be studied at a TeV-scale linear collider will indeed be fulfilled.","PeriodicalId":325505,"journal":{"name":"Physics and experiments with future linear e+ e- colliders","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114231855","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
An electron/positron linear collider with a center-of-mass energy between 0.5 and 1 TeV would be an important complement to the physics program of the LHC. The Next Linear Collider (NLC) is being designed by a US collaboration (FNAL, LBNL, LLNL, and SLAC) which is working closely with the Japanese collaboration that is designing the Japanese Linear Collider (JLC). The NLC main linacs are based on normal conducting 11 GHz rf. This paper will discuss the technical difficulties encountered as well as the many changes that have been made to the NLC design over the last year. These changes include improvements to the X-band rf system as well as modifications to the injector and the beam delivery system. They are based on new conceptual solutions as well as results from the R&D programs which have exceeded initial specifications. The net effect has been to reduce the length of the collider from about 32 km to 25 km and to reduce the number of klystrons and modulators by a factor of two. Together these lead to s...
{"title":"Progress in the Next Linear Collider Design","authors":"T. Raubenheimer","doi":"10.1063/1.1394298","DOIUrl":"https://doi.org/10.1063/1.1394298","url":null,"abstract":"An electron/positron linear collider with a center-of-mass energy between 0.5 and 1 TeV would be an important complement to the physics program of the LHC. The Next Linear Collider (NLC) is being designed by a US collaboration (FNAL, LBNL, LLNL, and SLAC) which is working closely with the Japanese collaboration that is designing the Japanese Linear Collider (JLC). The NLC main linacs are based on normal conducting 11 GHz rf. This paper will discuss the technical difficulties encountered as well as the many changes that have been made to the NLC design over the last year. These changes include improvements to the X-band rf system as well as modifications to the injector and the beam delivery system. They are based on new conceptual solutions as well as results from the R&D programs which have exceeded initial specifications. The net effect has been to reduce the length of the collider from about 32 km to 25 km and to reduce the number of klystrons and modulators by a factor of two. Together these lead to s...","PeriodicalId":325505,"journal":{"name":"Physics and experiments with future linear e+ e- colliders","volume":"15 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121047560","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Detector simulation programs are an important tool in both understanding the physics potential and the detector requirements at new proposed colliders. In the framework of the ECFA/DESY linear collider study the BRAHMS program has been developed. The program is used to simulate a detector for TESLA and to develop reconstruction algorithms for the different components. It is used to study in detail selected physics reactions. In this paper the status of the program is shown and some results from the reconstruction are discussed.
{"title":"BRAHMS—a detector simulation program for TESLA","authors":"T. Behnke","doi":"10.1063/1.1394399","DOIUrl":"https://doi.org/10.1063/1.1394399","url":null,"abstract":"Detector simulation programs are an important tool in both understanding the physics potential and the detector requirements at new proposed colliders. In the framework of the ECFA/DESY linear collider study the BRAHMS program has been developed. The program is used to simulate a detector for TESLA and to develop reconstruction algorithms for the different components. It is used to study in detail selected physics reactions. In this paper the status of the program is shown and some results from the reconstruction are discussed.","PeriodicalId":325505,"journal":{"name":"Physics and experiments with future linear e+ e- colliders","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121790578","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
An algorithm for an improved description of final-state QCD radiation is introduced. It is matched to the first-order matrix elements for gluon emission in a host of decays, for processes within the Standard Model and the Minimal Supersymmetric extension thereof.
{"title":"QCD radiation off heavy particles","authors":"T. Sjöstrand","doi":"10.1063/1.1394342","DOIUrl":"https://doi.org/10.1063/1.1394342","url":null,"abstract":"An algorithm for an improved description of final-state QCD radiation is introduced. It is matched to the first-order matrix elements for gluon emission in a host of decays, for processes within the Standard Model and the Minimal Supersymmetric extension thereof.","PeriodicalId":325505,"journal":{"name":"Physics and experiments with future linear e+ e- colliders","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115827562","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A sandwich type of the tile-fiber hadron calorimeter was constructed and tested at KEK and Fermilab. The energy resolution, linearity and e/π ratio were measured. The results indicate that the detector is quite promising for the calorimeter of the Linear Collider detector.
{"title":"Performance of the tile-fiber hadron calorimeter","authors":"T. Takeshita","doi":"10.1063/1.1394459","DOIUrl":"https://doi.org/10.1063/1.1394459","url":null,"abstract":"A sandwich type of the tile-fiber hadron calorimeter was constructed and tested at KEK and Fermilab. The energy resolution, linearity and e/π ratio were measured. The results indicate that the detector is quite promising for the calorimeter of the Linear Collider detector.","PeriodicalId":325505,"journal":{"name":"Physics and experiments with future linear e+ e- colliders","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115974066","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The current status of the JLC central tracker R&D is reviewed, stressing progress made since the Sitges meeting. R&D’s future direction is also discussed, taking into account possible changes in basic chamber parameters.
{"title":"JLC central tracker R&D","authors":"K. Fujii","doi":"10.1063/1.1394435","DOIUrl":"https://doi.org/10.1063/1.1394435","url":null,"abstract":"The current status of the JLC central tracker R&D is reviewed, stressing progress made since the Sitges meeting. R&D’s future direction is also discussed, taking into account possible changes in basic chamber parameters.","PeriodicalId":325505,"journal":{"name":"Physics and experiments with future linear e+ e- colliders","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117342308","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this review, we discuss on the possibilities of physics and experiments other than the e+e− interaction, i.e., γγ, eγ and e−e− interaction, putting emphasis on luminosities and physics opportunities with these options. We briefly discuss on technical issues on the options as well.
在这篇综述中，我们讨论了除了e+e -相互作用之外的物理和实验的可能性，即γγ， γγ和e - e -相互作用，重点放在这些选择的光度和物理机会上。我们还简要讨论了选项的技术问题。
{"title":"γγ, eγ and e−e− options","authors":"Tohru Takahashi","doi":"10.1063/1.1394305","DOIUrl":"https://doi.org/10.1063/1.1394305","url":null,"abstract":"In this review, we discuss on the possibilities of physics and experiments other than the e+e− interaction, i.e., γγ, eγ and e−e− interaction, putting emphasis on luminosities and physics opportunities with these options. We briefly discuss on technical issues on the options as well.","PeriodicalId":325505,"journal":{"name":"Physics and experiments with future linear e+ e- colliders","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132274194","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
At the future linear collider, most of the interesting physics processes have many jets in the final state. For this reason, the design of the calorimeter has to be evaluated through the jets reconstruction (Eflow). In the calorimeter session, about half of the talks were related to Eflow, the second half concerning the hardware side of the studies. All groups agreed on the importance of quantifying the proposed detector through a reconstruction program of the multi-jet events. A first attempt to reconstruct with fully simulated events using the ECFA proposed detector, reached a jet energy resolution of ΔEJET∼40%EJET which seemed mandatory for the very rich physics program on the Linear Collider. It corresponds to a significant improvement when compared to LEP/SLD experiments. To reach this kind of value both ECFA and LCD(US) groups followed the road of sampling calorimeter, with a large number of segmentations and a small pad size. It is not the case of JLC-group which took the road of hardware compensat...
{"title":"Summary of the calorimeter session","authors":"J. Brient","doi":"10.1063/1.1394449","DOIUrl":"https://doi.org/10.1063/1.1394449","url":null,"abstract":"At the future linear collider, most of the interesting physics processes have many jets in the final state. For this reason, the design of the calorimeter has to be evaluated through the jets reconstruction (Eflow). In the calorimeter session, about half of the talks were related to Eflow, the second half concerning the hardware side of the studies. All groups agreed on the importance of quantifying the proposed detector through a reconstruction program of the multi-jet events. A first attempt to reconstruct with fully simulated events using the ECFA proposed detector, reached a jet energy resolution of ΔEJET∼40%EJET which seemed mandatory for the very rich physics program on the Linear Collider. It corresponds to a significant improvement when compared to LEP/SLD experiments. To reach this kind of value both ECFA and LCD(US) groups followed the road of sampling calorimeter, with a large number of segmentations and a small pad size. It is not the case of JLC-group which took the road of hardware compensat...","PeriodicalId":325505,"journal":{"name":"Physics and experiments with future linear e+ e- colliders","volume":"153 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131990613","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A Time Projection Chamber (TPC) is proposed as the main tracking device for the detector at the future e+e− linear accelerator now studied in Europe. The performance requirements and the basic design using a Gas Electron Multiplier (GEM) as the readout device are described. Some preliminary R&D results are discussed.
{"title":"TPC with GEM readout for TESLA","authors":"M. Schumacher","doi":"10.1063/1.1394434","DOIUrl":"https://doi.org/10.1063/1.1394434","url":null,"abstract":"A Time Projection Chamber (TPC) is proposed as the main tracking device for the detector at the future e+e− linear accelerator now studied in Europe. The performance requirements and the basic design using a Gas Electron Multiplier (GEM) as the readout device are described. Some preliminary R&D results are discussed.","PeriodicalId":325505,"journal":{"name":"Physics and experiments with future linear e+ e- colliders","volume":"158 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116112805","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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