Testing Yukawa-unified SUSY during year 1 of LHC: the role of multiple b-jets, dileptons and missing ET
Testing Yukawa-unified SUSY during year 1 of LHC: the role of multiple b-jets, dileptons and missing ET
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在大型强子对撞机的第一年测试汤川统一的 SUSY：多个 b-jet、双轻子和缺失的 ET 的作用
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发表时间：
2009
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通讯作者：
S. Sekmen
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作者：
H. Baer;S. Kraml;A. Lessa;S. Sekmen
假设积分光度值为∼0.1-1 FB−1，我们考察了在大型强子对撞机运行的第一年中检验SO(10)汤川统一超对称模型的前景。我们考虑两种情况：希格斯分裂(HS)和D项分裂(DR3)。每一个一般都预测轻胶子和重夸克，具有倒置的标量质量等级。因此，我们预计胶子对产生的速率很大，然后衰变到具有大b喷流多重数的终态。对于0.2fb−1的积分光度，我们通过检查多b喷流的终态，发现了一个5σ的发现范围${m_{ilde g}}sim 400，{ext{gev}}$，即使丢失的横向能量ETMISH不是一个可行的切割变量。在HS模型的情况下，确认信号应该在对号(OS)双分子通道中突出；DR3模型将需要更高的综合光度来在OS双分子通道中产生信号。如果在多b+T未命中信道中执行相应的搜索，则该区域也可以由具有5-10 Fb−1数据的Tevatron探测。随着∼1 FB−1更高的集成亮度，使用ETMISTH加上大量的b喷流，大型强子对撞机应该能够发现具有${m_{ilde g}}less sim 630，{ext{gev}}$的汤川统一超对称。因此，汤川统一的SUSY的第一年LHC到达应该足以宣称发现了胶子，或者几乎排除了这类模型，因为较高的${m_{ilde g}}$会导致相当差的汤川统一。
We examine the prospects for testing SO(10) Yukawa-unified supersymmetric models during the first year of LHC running at $ sqrt s = 7,{ ext{TeV}} $, assuming integrated luminosity values of ∼0.1-1 fb−1. We consider two cases: the Higgs splitting (HS) and the D-term splitting (DR3) models. Each generically predicts light gluinos and heavy squarks, with an inverted scalar mass hierarchy. We hence expect large rates for gluino pair production followed by decays to final states with large b-jet multiplicity. For 0.2 fb−1 of integrated luminosity, we find a 5σ discovery reach of $ {m_{ ilde g}} sim 400,{ ext{GeV}} $ even if missing transverse energy, ETmiss , is not a viable cut variable, by examining the multi-b-jet final state. A corroborating signal should stand out in the opposite-sign (OS) dimuon channel in the case of the HS model; the DR3 model will require higher integrated luminosity to yield a signal in the OS dimuon channel. This region may also be probed by the Tevatron with 5–10 fb−1 of data, if a corresponding search in the multi-b + ETmiss channel is performed. With higher integrated luminosities of ∼1 fb−1, using ETmiss plus a large multiplicity of b-jets, LHC should be able to discover Yukawa-unified SUSY with $ {m_{ ilde g}} lesssim 630,{ ext{GeV}} $. Thus, the year 1 LHC reach for Yukawa-unified SUSY should be enough to either claim a discovery of the gluino, or to very nearly rule out this class of models, since higher values of $ {m_{ ilde g}} $ lead to rather poor Yukawa unification.