In the framework of top-color assisted technicolor (TC2) theory, we study the four decay processes of charged top-pion, i.e., . The decay branching ratio of these modes are calculated. The results show that the main d...In the framework of top-color assisted technicolor (TC2) theory, we study the four decay processes of charged top-pion, i.e., . The decay branching ratio of these modes are calculated. The results show that the main decay channels of charged top-pion are the tree level modes: and . Light is easier to be detected than heavy one at future coliders. So, the study provides us with some useful informations to search for charged top-pion.展开更多
The single charged top-pion production processes e~+ e~- → tbΠ_t~- and e~+e~- → W~+Π_t~- are studied in the framework of top-color-assisted technicolor (TC2) model. Ourstudies show that the cross section σ(e~+ e...The single charged top-pion production processes e~+ e~- → tbΠ_t~- and e~+e~- → W~+Π_t~- are studied in the framework of top-color-assisted technicolor (TC2) model. Ourstudies show that the cross section σ(e~+ e~- → tbΠ_t~-) Teaches the level of tens of fb andσ(e~+ e~- → W~+Π_t~-) reaches the level of a few fb. With the yearly integrated luminosity of ￡～ 500 fb~(-1) expected at the planned colliders, one could collect thousands of charged top-pion ofevents via the process e~+ e~- → tbΠ_t~- and hundreds of events via the process e~+ e~- →W~+Π_t~-. The flavor changing decay mode Π_t~- → bc is the best channel to detect chargedtop-pion due to the clean SM background. With a large number of events and the clean background, thecharged top-pion should be observable at the planned colliders. Therefore, our studies in thispaper can help us to search for charged top-pion, and furthermore, to test the TC2 model.展开更多
We studied the charged top-pion in the topcolor assisted technicolor model(TC2).If the charged top-pionsare heavy,m_(πt)>m_t+m_b,they will decay mainly via the channel π_t^+→tb^-.We also calculated the productio...We studied the charged top-pion in the topcolor assisted technicolor model(TC2).If the charged top-pionsare heavy,m_(πt)>m_t+m_b,they will decay mainly via the channel π_t^+→tb^-.We also calculated the production of chargedtop-pion at the Tevatron and LHC.The cross section can reach to 100 fb at the Tevatron and dozens of pb at the LHCdepending on the mass of the top-pion.展开更多
In this paper, we study the production of the neutral top-pion （Πt^0） associated with a gauge boson at the LHC, i.e. pp →Πt^0V （V = g, W, Z, γ）. The cross section of pp→Πt^0g is at the level of 10^2 pb in th...In this paper, we study the production of the neutral top-pion （Πt^0） associated with a gauge boson at the LHC, i.e. pp →Πt^0V （V = g, W, Z, γ）. The cross section of pp→Πt^0g is at the level of 10^2 pb in the most parameter space. Such a process with the flavor-changing decay mode Πt^0→tc might provide viable signatures to detect rio at the LHC. The cross sections of other processes pp →→Πt^0W（Z,γ） distinguish the Higgs boson in the SM or MSSM from rio. are too small to detect Πt^0, which open a window to distinguish the Higgs boson in the SM or MSSM from Πt^0展开更多
In the framework of the topcolor-assisted technicolor （TC2） model, we study the production of the neutral top-pion πt^0 in association with a high-pw jet at the LHC, which proceeds via the partonic processes gg→π...In the framework of the topcolor-assisted technicolor （TC2） model, we study the production of the neutral top-pion πt^0 in association with a high-pw jet at the LHC, which proceeds via the partonic processes gg→πt^0g, gq →πt^0q, qq→πt^0g, gb（b）→πt^0b（b）, and bb→πt^0g. We find that it is very challenging to detect the neutral top-pion πt^0 via the process pp → πt^0 ＋jet ＋ X＋ tt＋jet ＋X, while the possible signatures of πt^0 might be detected via the process pp→πt^0 ＋jet ＋ X→（tc＋tc）＋jet＋X at the LHC.展开更多
The top triangle moose （TTM） model, which can be seen as the deconstructed version of the topcolor- assisted technicolor （TC2） model, predicts the existence of the charged top-pious πt± in low energy spectru...The top triangle moose （TTM） model, which can be seen as the deconstructed version of the topcolor- assisted technicolor （TC2） model, predicts the existence of the charged top-pious πt± in low energy spectrum. In the context of this model, we consider photoproduction of πt± via the subprocesses γb→tπt- and γb -tπt＋ at the large hadron-electron eollider （LHeC）, in which high energy photon beams are generated by using the Compton backscatting method. We find that, as long as the charged top-pious are not too heavy, they can be abundantly produced via γb collision.展开更多
基金国家自然科学基金，河南省教育厅优秀青年基金，the Henan Innovation Project for University Prominent Research Talents
文摘In the framework of top-color assisted technicolor (TC2) theory, we study the four decay processes of charged top-pion, i.e., . The decay branching ratio of these modes are calculated. The results show that the main decay channels of charged top-pion are the tree level modes: and . Light is easier to be detected than heavy one at future coliders. So, the study provides us with some useful informations to search for charged top-pion.
基金国家自然科学基金，河南省教育厅优秀青年基金，the Henan Innovation Project for University Prominent Research Talents
文摘The single charged top-pion production processes e~+ e~- → tbΠ_t~- and e~+e~- → W~+Π_t~- are studied in the framework of top-color-assisted technicolor (TC2) model. Ourstudies show that the cross section σ(e~+ e~- → tbΠ_t~-) Teaches the level of tens of fb andσ(e~+ e~- → W~+Π_t~-) reaches the level of a few fb. With the yearly integrated luminosity of ￡～ 500 fb~(-1) expected at the planned colliders, one could collect thousands of charged top-pion ofevents via the process e~+ e~- → tbΠ_t~- and hundreds of events via the process e~+ e~- →W~+Π_t~-. The flavor changing decay mode Π_t~- → bc is the best channel to detect chargedtop-pion due to the clean SM background. With a large number of events and the clean background, thecharged top-pion should be observable at the planned colliders. Therefore, our studies in thispaper can help us to search for charged top-pion, and furthermore, to test the TC2 model.
文摘We studied the charged top-pion in the topcolor assisted technicolor model(TC2).If the charged top-pionsare heavy,m_(πt)>m_t+m_b,they will decay mainly via the channel π_t^+→tb^-.We also calculated the production of chargedtop-pion at the Tevatron and LHC.The cross section can reach to 100 fb at the Tevatron and dozens of pb at the LHCdepending on the mass of the top-pion.
基金The project supported by National Natural Science Foundation of China under Grant No. 10375017, the Excellent Youth Foundation of Henan Scientific Committee, and the Henan Innovation Project for University Prominent Reseaxch Talents
文摘In this paper, we study the production of the neutral top-pion （Πt^0） associated with a gauge boson at the LHC, i.e. pp →Πt^0V （V = g, W, Z, γ）. The cross section of pp→Πt^0g is at the level of 10^2 pb in the most parameter space. Such a process with the flavor-changing decay mode Πt^0→tc might provide viable signatures to detect rio at the LHC. The cross sections of other processes pp →→Πt^0W（Z,γ） distinguish the Higgs boson in the SM or MSSM from rio. are too small to detect Πt^0, which open a window to distinguish the Higgs boson in the SM or MSSM from Πt^0
基金Supported by NSFC (10675057)Foundation of Liaoning Educational Committee (2007T086)
文摘In the framework of the topcolor-assisted technicolor （TC2） model, we study the production of the neutral top-pion πt^0 in association with a high-pw jet at the LHC, which proceeds via the partonic processes gg→πt^0g, gq →πt^0q, qq→πt^0g, gb（b）→πt^0b（b）, and bb→πt^0g. We find that it is very challenging to detect the neutral top-pion πt^0 via the process pp → πt^0 ＋jet ＋ X＋ tt＋jet ＋X, while the possible signatures of πt^0 might be detected via the process pp→πt^0 ＋jet ＋ X→（tc＋tc）＋jet＋X at the LHC.
基金Supported in part by the National Natural Science Foundation of China under Grant No.10975067the Natural Science Foundation of the Liaoning Scientific Committee under Grant No.201102114Foundation of Liaoning Educational Committee under Grant No.LT2011015
文摘The top triangle moose （TTM） model, which can be seen as the deconstructed version of the topcolor- assisted technicolor （TC2） model, predicts the existence of the charged top-pious πt± in low energy spectrum. In the context of this model, we consider photoproduction of πt± via the subprocesses γb→tπt- and γb -tπt＋ at the large hadron-electron eollider （LHeC）, in which high energy photon beams are generated by using the Compton backscatting method. We find that, as long as the charged top-pious are not too heavy, they can be abundantly produced via γb collision.
