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In the Littlest Higgs model with $T$ parity (LHT), the $T$-odd heavy photon ($A_H$) is weakly interacting and can play the role of dark matter. We investigate the lower limit on the mass of $A_H$ dark matter under the constraints from Higgs…

High Energy Physics - Phenomenology · Physics 2017-02-01 Lei Wu , Bingfang Yang , Mengchao Zhang

We study the potential of hadron colliders in the search for the pair production of neutral Higgs bosons in the framework of the Minimal Supersymmetric Standard Model. Using analytical expressions for the relevant amplitudes, we perform a…

High Energy Physics - Phenomenology · Physics 2007-05-23 A. Belyaev , M. Drees , O. J. P Eboli , J. K. Mizukoshi , S. F. Novaes

We study the top-quark pair production via polarized and unpolarized photon collisions at the International Linear Collider in the context of the littlest Higgs model with T-parity. We calculate the production cross section of the process…

High Energy Physics - Phenomenology · Physics 2015-06-04 Bingfang Yang

We study the effects of T-odd interactions of top-quark via the pair production of top-quark in the semileptonic detection modes at the Large Hadron Collider by means of the T-odd observables constructed through the momenta of the observed…

High Energy Physics - Phenomenology · Physics 2021-04-20 Apurba Tiwari , Sudhir Kumar Gupta

The Littlest Higgs Model with T-parity (LHT) belongs to the simplest new physics scenarios with new sources of flavour and CP violation. We present a new analysis of quark observables in the LHT model in view of the oncoming flavour…

High Energy Physics - Phenomenology · Physics 2016-04-07 Monika Blanke , Andrzej J. Buras , Stefan Recksiegel

Pair production of Higgs boson at the Large Hadron Collider (LHC) is known to be important for the determination of Higgs boson self-coupling and the probe of new physics beyond the Standard Model (SM), especially the existence of new…

High Energy Physics - Phenomenology · Physics 2019-05-01 Chuan-Ren Chen , Yu-Xiang Lin , Van Que Tran , Tzu-Chiang Yuan

Following previous study, in the Littlest Higgs model (LHM), the heavy photon is supposed to be a possible dark matter candidate and its relic abundance of the heavy photon is estimated in terms of the Boltzman-Lee-Weinberg time-evolution…

High Energy Physics - Phenomenology · Physics 2009-01-01 Qing-Peng Qiao , Jian Tang , Xue-Qian Li

In the framework of the littlest Higgs model with T-parity (LHT), we study the contributions of the T-even and T-odd particles to the branching ratio R_b. We find that the precision data of R_b can give strong constraints on the masses of…

High Energy Physics - Phenomenology · Physics 2009-11-06 Xiao-Fang Han

Effective interactions involving both the top quark and the Higgs field are among the least constrained of all possible (gauge invariant) dimension-six operators in the Standard Model. Such a handful of operators, in particular the top…

High Energy Physics - Phenomenology · Physics 2015-06-05 C. Degrande , J. -M. Gérard , C. Grojean , F. Maltoni , G. Servant

We present discovery limits for heavy quarks in the Bestest Little Higgs model via pair production at the LHC running at $\sqrt{s} = 7 \mathrm{TeV}$. We study pair produced heavy top-like quarks decaying to $b\bar{b}W^+W^-$ and $t\bar{t}ZZ$…

High Energy Physics - Phenomenology · Physics 2012-04-18 Stephen Godfrey , Thomas Gregoire , Pat Kalyniak , Travis A. W. Martin , Kenneth Moats

The T-odd leptons are the typical particles predicted by the littlest Higgs model with T-parity (LHT model) and the observation of these particles might be regarded as the direct evidence of the LHT model. In this paper, we investigate the…

High Energy Physics - Phenomenology · Physics 2015-06-04 Qing-Guo Zeng , Chong-Xing Yue , Jiao Zhang

In the context of the little Higgs models, we discuss single production of the new charged gauge bosons in association with top quark at the $CERN$ Large Hadron Collider$(LHC)$. We find that the new charged gauge bosons $W_{H}^{-}$ and…

High Energy Physics - Phenomenology · Physics 2008-11-26 Chong-Xing Yue , Shuo Yang , Li-Hong Wang

Based on a recent idea by Krohn and Yavin, we construct a little Higgs model with an internal parity that is not broken by anomalous Wess-Zumino-Witten terms. The model is a modification of the "minimal moose" models by Arkani-Hamed et al.…

High Energy Physics - Phenomenology · Physics 2011-04-04 A. Freitas , P. Schwaller , D. Wyler

The vectorlike top partners $T$ are predicted in many extensions of the Standard Model (SM). In a simplified model including a single vectorlike $T$ quark with charge $2/3$, we investigate the process $pp \to Tj$ induced by the couplings…

High Energy Physics - Phenomenology · Physics 2017-03-08 Yao-Bei Liu

We consider single production of the heavy top quark T predicted by the three-site Higgsless model in future high energy collider experiments, such as the high energy linear e^{+}e^{-} collider (ILC), the linear-ring type $ep$ collider…

High Energy Physics - Phenomenology · Physics 2008-11-26 Chong-Xing Yue , Li-Hong Wang , Jia Wen

With a high instantaneous luminosity and the large top quark pair production cross section, the Large Hadron Collider (LHC) will be a "top factory" allowing the analysis of millions of top events. After a short description of the top quark…

High Energy Physics - Experiment · Physics 2007-05-23 Florian Beaudette

If one takes naturalness seriously and also assumes a weakly coupled extension of the Standard Model (SM) then there are predictions for phenomenology that can be inferred in a model independent framework. The first such prediction is that…

High Energy Physics - Phenomenology · Physics 2008-11-26 Patrick Meade , Matthew Reece

The colored SU(2)-singlet heavy T-quark is one of the most crucial ingredients in little Higgs models, which is introduced to cancel the largest contribution of the SM top quark to the Higgs boson mass at one-loop level. In two…

High Energy Physics - Phenomenology · Physics 2014-11-18 Kingman Cheung , C. S. Kim , Kang Young Lee , Jeonghyeon Song

In the framework of the littlest Higgs($LH$) model and the littlest Higgs model with T-parity($LHT$), We investigate the single top production process $e^{-}\gamma\to \nu_{e}b\bar{t}$, and calculate the corrections of these two models to…

High Energy Physics - Phenomenology · Physics 2007-05-23 Yao-Bei Liu , Jie-Fen Shen , Xue-Lei Wang

Little Higgs theories are an attempt to address the little hierarchy problem, i.e., the tension between the naturalness of the electroweak scale and the precision measurements showing no evidence for new physics up to 5-10 TeV. In little…

High Energy Physics - Phenomenology · Physics 2011-07-19 Hsin-Chia Cheng , Ian Low
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