LHC reach of low scale gauge mediation with perturbatively stable vacuum

Very light gravitino scenario m_3/2?16 eV$m_{3/2}?16\text{eV}$ is very interesting, since there is no cosmological problem. However in such a scenario, stability of the vacuum is an important issue. Recently, Yonekura and one of the authors RS have investigated the parameter space of a low scale gauge mediation with a perturbatively stable vacuum and found that there are severe upper bounds on the gaugino masses. In this Letter, we show that such a model can be completely excluded/discovered at very early stage of the LHC run.     

On the trail of a new state of matter

Following the results collected in the past 30 years within the heavy-ion scientific program, the progress achieved so far at the CERN LHC during the first data taking period is reviewed.     

Hard Probes 2010: Experimental summary

A (personal) experimental summary of the Hard Probes 2010 conference is presented.     

外周天线LHCⅡ的荧光光谱特性

外周天线LHC在光合作用过程中,担负着吸收和传递光能的作用.我们采用扫描成象荧光光谱技术对菠菜中外周天线LHC的荧光光谱特性进行了研究,在514.5nm的激光激励下获取了积分荧光谱,认为从类胡萝卜素分子到叶绿素分子间存在有能量传递.采用高斯组分光谱解析的方法,解析出LHC的荧光发射有七个谱带:656.7、664.6、671.5、677.2、683.5、689.6、695.3nm,各自所占的比例分别为3.0%、13.1%、13.3%、21.1%、13.2%、33.3%、3.0%,其中658.7nm的发射谱是由叶绿素b分子所发射的,其余的发射谱分别是由吸收峰为662、670/671、676、680nm以及吸收大于690nm的叶绿素a分子所发射.3.0%的叶绿素b分子的荧光发射说明在能量平衡过程中绝大部分能量被叶绿素a分子所禁锢,689.6nm处的荧光所占的比例最大,可能与LHC的一种自保护机制有关     

Present and future of neutrino oscillation experiments

Results of a new study of the discovery potential within mSUGRA parameter space of inclusive searches for SUSY at ATLAS are presented. These results indicate that superior performance is provided by the jets + E_T^miss channel in which no requirements are placed upon lepton multiplicity. The sensitivity of this and other channels is mapped in m₀ - m_1/2 parameter space for four different values of tan(β) with similar performance being obtained in all cases. Inclusive measurements of the effective mass scale M_susy^eff and total production cross-section σ_susy of supersymmetric particles are also discussed and results presented of a study of the likely measurement precisions.     

The wily colonial boy

We review here the prospects of a long-term upgrade programme for the Large Hadron Collider (LHC), CERN laboratory's new proton–proton collider. The super-LHC, which is currently under evaluation and design, is expected to deliver of the order of ten times the statistics of the LHC. In addition to a non-technical summary of the principal physics arguments for the upgrade, I present a pedagogical introduction to the technological challenges on the accelerator and experimental fronts, and a review of the current status of the planning.