Amandine Besson

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A search for narrow resonances in the dijet mass spectrum is performed using data corresponding to an integrated luminosity of 2.9 pb⁻¹ collected by the CMS experiment at the Large Hadron Collider. Upper limits at the 95% confidence level are presented on the product of the resonance cross section, branching fraction into dijets, and acceptance, separately(More)
The CBM Collaboration proposes to build a dedicated heavy-ion experiment to investigate the properties of highly compressed baryonic matter as it is produced in nucleus-nucleus collisions at the future accelerator facility in Darmstadt. Our goal is to explore the QCD phase diagram in the region of moderate temperatures but very high baryon densities. The(More)
The standard model of particle physics contains parameters--such as particle masses--whose origins are still unknown and which cannot be predicted, but whose values are constrained through their interactions. In particular, the masses of the top quark (M(t)) and W boson (M(W)) constrain the mass of the long-hypothesized, but thus far not observed, Higgs(More)
The ratio of the proton's elastic electromagnetic form factors, G Ep ͞G Mp , was obtained by measuring P t and P ᐉ , the transverse and the longitudinal recoil proton polarization, respectively. For elastic ៬ ep ! e ៬ p, G Ep ͞G Mp is proportional to P t ͞P ᐉ. Simultaneous measurement of P t and P ᐉ in a polarimeter provides good control of the systematic(More)
CMOS pixel sensors are being developed for the CBM Micro-Vertex Detector (MVD). They provide the high resolution required to reconstruct efficiently decay vertices of short-lived particles , such as charmed mesons. The present R&D is mainly driven by the severe running conditions expected in the vicinity of the experimental target. The most significant(More)
We describe QUAERO, a method that (i) enables the automatic optimization of searches for physics beyond the standard model, and (ii) provides a mechanism for making high energy collider data generally available. We apply QUAERO to searches for standard model WW, ZZ, and t t macro production, to searches for these objects produced through a new heavy(More)
We present a search for charged Higgs bosons in decays of pair-produced top quarks in pp collisions at sqrt[s] = 1.8 TeV recorded by the D0 detector at the Fermilab Tevatron collider. With no evidence for signal, we exclude most regions of the ( M(H+/-),tan(beta)) parameter space where the decay t--> H(+)b has a branching fraction >0.36 and(More)
We present results of searches for technirho (rho(T)), techniomega (omega(T)), and Z' particles, using the decay channels rho(T),omega(T),Z'-->e(+)e(-). The search is based on 124.8 pb(-1) of data collected by the D0 detector at the Fermilab Tevatron during 1992-1996. In the absence of a signal, we set 95% C.L. upper limits on the cross sections for the(More)
The results based on 1992 –95 data (Run 1) from the CDF and D0 experiments on the measurements of the W boson mass and width are presented, along with the combined results. We report a Tevatron collider average M W ˆ 80:456 0:059 GeV. We also report the Tevatron collider average of the directly measured W boson width ÿ W ˆ 2:115 0:105 GeV. We describe a new(More)
We have measured the W boson mass using the DØ detector and a data sample of 82 pb Ϫ1 from the Fermilab Tevatron collider. This measurement uses W→e␯ decays, where the electron is close to a boundary of a central electromagnetic calorimeter module. Such ''edge'' electrons have not been used in any previous DØ analysis, and represent a 14% increase in the W(More)