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The normalised differential top quark-antiquark production cross section is measured as a function of the jet multiplicity in proton-proton collisions at a centre-of-mass energy of 7 TeV at the LHC with the CMS detector. The measurement is…

高能物理 - 实验 · 物理学 2015-05-19 CMS Collaboration

In relativistic ion collisions there are excellent opportunities to produce and investigate hyper-nuclei. We have systematically studied the formation of hypernuclear spectator residues in peripheral heavy-ion collisions with the transport…

核理论 · 物理学 2017-02-01 A. S. Botvina , K. K. Gudima , J. Steinheimer , M. Bleicher , J. Pochodzalla

A search for the production of a heavy B quark, having electric charge -1/3 and vector couplings to W, Z, and H bosons, is carried out using proton-proton collision data recorded at the CERN LHC by the CMS experiment, corresponding to an…

高能物理 - 实验 · 物理学 2016-06-22 CMS Collaboration

Three of the most significant measured deviations from standard model predictions, the enhanced decay rate for B $\to$ D$^{(*)}\tau\nu$, hints of lepton universality violation in B $\to$ K$^{(*)}\ell\ell$ decays, and the anomalous magnetic…

高能物理 - 实验 · 物理学 2019-03-14 CMS Collaboration

We present results of phenomenological studies for top-quark pair production at the LHC at the center of mass energy $\sqrt{S} = 7$ TeV. The transverse momentum and rapidity distributions for final-state top quarks are calculated in…

高能物理 - 唯象学 · 物理学 2014-09-02 Marco Guzzi , Katerina Lipka , Sven-Olaf Moch

The TOPG\"ot project studies a sample of 86 high-mass star-forming regions in different evolutionary stages from starless cores to ultra compact HII regions. The aim of the survey is to analyze different molecular species in a statistically…

We study the fermion pair production from a strong electric field in boost-invariant coordinates in (3+1) dimensions and exploit the cylindrical symmetry of the problem. This problem has been used previously as a toy model for populating…

高能物理 - 唯象学 · 物理学 2014-11-18 Bogdan Mihaila , Fred Cooper , John F. Dawson

We have investigated the chemistry of ${\rm C + H_3^+}$ forming CH$^+$, CH$_2^+$, and CH$_3^+$. These reactions are believed to be some of the key gas-phase astrochemical processes initiating the formation of organic molecules in molecular…

天体物理仪器与方法 · 物理学 2015-07-15 A. P. O'Connor , X. Urbain , J. Stützel , K. A. Miller , N. de Ruette , M. Garrido , D. W. Savin

We study a new production mechanism for heavy neutrinos at the LHC, which dominates over the usually considered $s$-channel $W$-exchange diagram for heavy-neutrino masses larger than 100 - 200 GeV. The new mechanism is infrared-enhanced by…

高能物理 - 唯象学 · 物理学 2014-03-05 P. S. Bhupal Dev , Apostolos Pilaftsis , Un-ki Yang

We study the prospects of measuring the CKM matrix element $\vert V_{ts}\vert$ at the LHC with the top quarks produced in the processes $p p \to t\bar{t}X$ and $p p \to t/\bar{t} X$, and the subsequent decays $t \to W^+s$ and $\bar{t} \to…

高能物理 - 唯象学 · 物理学 2014-11-21 Ahmed Ali , Fernando Barreiro , Theodota Lagouri

We investigate calcium carbonate scale formation at high Reynolds numbers in a large pipe rig facility. The calcium carbonate solution is produced from the injection, at a T-joint inlet, of pH-stabilized sodium carbonate and calcium…

流体动力学 · 物理学 2021-07-27 L. Moriconi , T. Nascimento , B. G. B. de Souza , J. B. R. Loureiro

Metal superhydrides, known for their high hydrogen content and polyhedral hydrogen cages, are promising candidates for high-temperature superconductivity. Recent research has emphasized "chemical pre-compression," enabling hydrogen…

超导电性 · 物理学 2025-03-06 Yuanhui Sun , Maosheng Miao

The synthesis of superheavy elements strongly relies on the competition of the quasifission and fusion fission dynamics in the fusion-evaporation reactions. The systematics on the formation of superheavy nuclei in the $^{48}$Ca, $^{50}$Ti,…

核理论 · 物理学 2025-11-25 Zi-Han Wang , Peng-Hui Chen , Ya-Ling Zhang , Ming-Hui Huang , Zhao-Qing Feng

Top quark production in proton proton collisions at the Large Hadron Collider (LHC) is reviewed using data collected by the ATLAS and CMS detectors. Most recent results on searches for new physics related to top quark production mechanism…

高能物理 - 实验 · 物理学 2019-08-15 Francesco Spanò

We review recent developments in the QCD description of jet production and modification in reactions with heavy nuclei at relativistic energies. Our goal is to formulate a perturbative expansion in the presence of nuclear matter that allows…

高能物理 - 唯象学 · 物理学 2011-05-27 I. Vitev

Radiative association cross sections and rates are computed, using a quantum approach, for the formation of C$_2$ molecules (dicarbon) during the collision of two ground state C($^3$P) atoms. We find that transitions originating in the…

宇宙学与河外天体物理 · 物理学 2021-03-29 James F. Babb , R. T. Smyth , B. M. McLaughlin

Neutrino trident scattering is a rare Standard Model process where a charged-lepton pair is produced in neutrino-nucleus scattering. To date, only the dimuon final-state has been observed, with around 100 total events, while the other…

A search has been performed for scalar top quark pair production in the lepton+jets channel in ~1 fb^(-1) of data. Kinematic differences between the exotic stop-stopbar and the dominant ttbar process are used to separate the two possible…

高能物理 - 实验 · 物理学 2007-10-05 D0 Collaboration , Su-Jung Park

At existing and planned neutrino factories (high energy and high intensity neutrino beam facilities) precision studies of QCD in neutrino-nucleon interactions are a realistic opportunity. We investigate charmonium production in fixed target…

高能物理 - 唯象学 · 物理学 2009-10-31 Alexey A. Petrov , Tibor Torma
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