HERA and THERA colliders

نویسندگان

  • Chongxing Yue
  • Dongqi Yu
  • Zhengjun Zong
چکیده

In the context of top-color assisted technicolor (TC2) models, we calculate the contributions of the neutral top-pion π t to tγ and tz production via the processes ep → γc → tγ and ep → γc → tz at the HERA and THERA colliders. Our results show that the cross sections σtγ(s) and σtz(s) are very small at the HERA collider with √ s = 320GeV . However, in most of the parameter space, σtγ(s) or σtz(s) is in the range of about 0.1pb ∼ 1pb at the THERA collider with √ s = 1000GeV . ∗E-mail:[email protected]

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Neutral top-pion and tγ(z) production at the HERA and THERA colliders

In the context of top-color assisted technicolor (TC2) models, we calculate the contributions of the neutral top-pion π t to tγ and tz production via the processes ep → γc → tγ and ep → γc → tz at the HERA and THERA colliders. Our results show that the cross sections σtγ(s) and σtz(s) are very small at the HERA collider with √ s = 320GeV . However, in most of the parameter space, σtγ(s) and σtz...

متن کامل

Linac-Ring Type Colliders: Second Way to TeV Scale

Main parameters and the physics search potentials of the linac-ring type lepton-hadron and photon-hadron colliders are discussed. The THERA (TESLA on HERA), ”NLC”-LHC and ”CLIC”-VLHC proposals are considered. PACS. 13.60.-r Photon and charged-lepton interactions with hadrons – 29.90.+r Other topics in elementary-particle and nuclear physics experimental methods and instrumentation

متن کامل

Heavy Quark Production Measurements at THERA

The total cross sections of charm and beauty production at a future high–energy ep collider, THERA, are expected to increase by factors of three and five, respectively, as compared to HERA. Heavy quarks can be measured at THERA in wide ranges of transverse momenta and Q values, thereby providing a solid basis for testing the perturbative QCD calculations. The charm and beauty contributions to t...

متن کامل

S ep 2 00 0 A fresh look at diffractive J / ψ photoproduction at HERA , with predictions for THERA

A fresh look at diffractive J/ψ photoproduction at HERA, with predictions for THERA. Abstract A new analysis of the photoproduction of the J/ψ-family is presented incorporating our recent model for the dipole cross section. The relative contributions from small and large transverse size fluctuations of the photon are clear and explicitly illustrate the mixing of pertur-bative and non-perturbati...

متن کامل

Determining the Spin Structure of the Photon at Future Colliders

Nothing is known experimentally about the parton content of circularly polarized photons, defined by ∆f(x,Q) ≡ f + (x,Q2)− f γ+ − (x,Q), where f γ+ + (f γ+ − ) denotes the density of a parton f with helicity ‘+’ (‘−’) in a photon with helicity ‘+’, and the next round of spin experiments, Compass and Rhic, is not sensitive to these distributions either. The ∆f contain information different from ...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2008