http://cp3.irmp.ucl.ac.be/ CP3 News feed http://cp3.irmp.ucl.ac.be/upload/logo/logo.png http://cp3.irmp.ucl.ac.be/News http://cp3.irmp.ucl.ac.be/News/81 http://cp3.irmp.ucl.ac.be/News/81 TOP 2017, in Braga, Portugal, the CMS experiment reported the first observation of the top pair (tt) production using proton-nucleus collisions at 8.16 TeV center-of-mass (c.o.m) energy. The excess of events with respect to the background-only hypothesis corresponds to a significance of more than 5σ (the conventional �golden standard� for observation) even under the most conservative assumptions. The measured top-pair cross section is consistent with the expectations from the scaled proton-proton data as well as pQCD predictions at next-to-next-to-leading order with next-to-next-to-leading-log accuracy.]]> http://cp3.irmp.ucl.ac.be/News/81 http://cp3.irmp.ucl.ac.be/images/news/81.png Mon, 18 Sep 2017 23:45:47 +0200 http://cp3.irmp.ucl.ac.be/News/80 http://cp3.irmp.ucl.ac.be/News/80 25th DIS international workshop in Birmingham, UK, the CMS experiment extended the very first cross section measurement of the top pair (tt) production at 5.02 TeV center-of-mass (c.o.m) energy. The measurement tracks the evolution of the tt cross section as a function of c.o.m energy, crucial for the extraction of the top-quark pole mass, while it is found to constrain the gluon distribution function at the un-explored large longitudinal parton momentum fraction regime. Future measurements of the tt cross section in nuclear collisions at the same nucleon-nucleon c.o.m energy would profit from the availability of such a reference measurement in pp collisions, without the need to extrapolate from measurements at different c.o.m energies.]]> http://cp3.irmp.ucl.ac.be/News/80 http://cp3.irmp.ucl.ac.be/images/news/80.png Tue, 04 Apr 2017 13:30:25 +0200 http://cp3.irmp.ucl.ac.be/News/79 http://cp3.irmp.ucl.ac.be/News/79
The local organizers.]]> http://cp3.irmp.ucl.ac.be/News/79 http://cp3.irmp.ucl.ac.be/images/news/79.png Mon, 12 Dec 2016 10:38:40 +0100 http://cp3.irmp.ucl.ac.be/News/78 http://cp3.irmp.ucl.ac.be/News/78 128th LHCC Open session meeting, both ATLAS and CMS experiments demonstrated for the first time candidate events whose signatures are compatible with the decay of a pair of top quarks in the nuclear environment of proton-Lead (pPb) collisions at a center-of-mass energy of 8.16 TeV. Currently, and while steadily moving to the last beam dumps for 2016 (Monday 5th), LHC runs with beam reversal mode at the same center-of-mass energy, where the directions of p and Pb bunches are reversed since not all LHC experiments are symmetric.]]> http://cp3.irmp.ucl.ac.be/News/78 http://cp3.irmp.ucl.ac.be/images/news/78.png Wed, 30 Nov 2016 17:58:52 +0100 http://cp3.irmp.ucl.ac.be/News/77 http://cp3.irmp.ucl.ac.be/News/77 http://cp3.irmp.ucl.ac.be/News/77 http://cp3.irmp.ucl.ac.be/images/news/77.png Wed, 23 Nov 2016 22:41:49 +0100 http://cp3.irmp.ucl.ac.be/News/76 http://cp3.irmp.ucl.ac.be/News/76 Enjoy the reading!]]> http://cp3.irmp.ucl.ac.be/News/76 http://cp3.irmp.ucl.ac.be/images/news/76.png Tue, 15 Nov 2016 19:45:52 +0100 http://cp3.irmp.ucl.ac.be/News/74 http://cp3.irmp.ucl.ac.be/News/74 $K^+\to\pi^+\nu\bar{\nu}$<\latex>]]> http://cp3.irmp.ucl.ac.be/News/74 http://cp3.irmp.ucl.ac.be/images/news/74.png Sun, 02 Oct 2016 15:33:03 +0200 http://cp3.irmp.ucl.ac.be/News/73 http://cp3.irmp.ucl.ac.be/News/73 http://cp3.irmp.ucl.ac.be/News/73 http://cp3.irmp.ucl.ac.be/images/news/73.png Wed, 21 Sep 2016 17:28:58 +0200 http://cp3.irmp.ucl.ac.be/News/72 http://cp3.irmp.ucl.ac.be/News/72 LHCP international conference in Lund, Sweden, the CMS experiment presented the very first cross section measurement of the top pair (tt) production at 5.02 TeV center-of-mass (c.o.m) energy. The measurement tracks the evolution of the tt cross section as a function of c.o.m energy, crucial for the extraction of the top-quark pole mass, while it can be used to constrain the gluon distribution function at the un-explored large longitudinal parton momentum fraction regime. Future measurements of the tt cross section in nuclear collisions at the same nucleon-nucleon c.o.m energy would profit from the availability of such a reference measurement in pp collisions, without the need to extrapolate from measurements at different c.o.m energies.]]> http://cp3.irmp.ucl.ac.be/News/72 http://cp3.irmp.ucl.ac.be/images/news/72.png Thu, 16 Jun 2016 18:17:53 +0200 http://cp3.irmp.ucl.ac.be/News/71 http://cp3.irmp.ucl.ac.be/News/71 web page you will find direct links to the GitHub repository, instructions on how to install and run MoMEMta, technical documentation, and many other things. If you are interested, please try it!! We are waiting for your feedback

MoMEMta is a CP3 product, adapting the MadWeight philosophy to the experimental needs.

The MoMEMta team]]> http://cp3.irmp.ucl.ac.be/News/71 http://cp3.irmp.ucl.ac.be/images/news/71.png Thu, 02 Jun 2016 16:16:47 +0200