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The lensing power spectrum from cosmic microwave background (CMB) temperature maps will be measured with unprecedented precision with upcoming experiments, including upgrades to ACT and SPT. Achieving significant improvements in…

宇宙学与河外天体物理 · 物理学 2015-06-17 A. van Engelen , S. Bhattacharya , N. Sehgal , G. P. Holder , O. Zahn , D. Nagai

A network of Timepix (TPX) devices installed in the ATLAS cavern measures the LHC luminosity as a function of time as a stand-alone system. The data were recorded from 13 TeV proton-proton collisions in 2015. Using two TPX devices, the…

The High-Luminosity Large Hadron Collider (HL-LHC) is designed to achieve higher instantaneous luminosities, enabling the exploration of the rarest processes of the Standard Model (SM). The CMS collaboration has published an Expression of…

高能物理 - 实验 · 物理学 2024-02-22 Michael Pitt

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

Lensing flux-ratio anomalies are most likely caused by gravitational lensing by small-scale dark matter structures. These anomalies offer the prospect of testing a fundamental prediction of the cold dark matter (CDM) cosmological model: the…

宇宙学与河外天体物理 · 物理学 2014-10-20 D. D. Xu , Dominique Sluse , Liang Gao , Jie Wang , Carlos Frenk , Shude Mao , Peter Schneider

The performance of the CMS electromagnetic calorimeter upgraded readout electronics, developed for the High-Luminosity phase of the LHC, is discussed. Data collected in two beam test campaigns conducted in 2018 and 2021 at the H4 and H2…

仪器与探测器 · 物理学 2025-11-24 The CMS Electromagnetic Calorimeter Group

A new type of fast luminosity separation scans ("Emittance Scans") was introduced at the CERN Large Hadron Collider (LHC) in 2015. The scans were performed systematically in every fill with full-intensity beams in physics production…

Flux ratio anomalies in strong gravitationally lensed quasars constitute a unique way to probe the abundance of non-luminous dark matter haloes, and hence the nature of dark matter. In this paper we identify double imaged quasars as a…

宇宙学与河外天体物理 · 物理学 2020-01-08 David Harvey , Wessel Valkenburg , Amelie Tamone , Alexey Boyarsky , Frederic Courbin , Mark Lovell

As modern precision cosmological measurements continue to show agreement with the broad features of the standard $\Lambda$-Cold Dark Matter ($\Lambda$CDM) cosmological model, we are increasingly motivated to look for small departures from…

宇宙学与河外天体物理 · 物理学 2017-05-11 Andrew Arrasmith , Brent Follin , Ethan Anderes , Lloyd Knox

The staged increase of the LHC beam energy provides a new class of interesting observables, namely ratios and double ratios of cross sections of various hard processes. The large degree of correlation of theoretical systematics in the cross…

高能物理 - 唯象学 · 物理学 2015-06-05 Michelangelo L. Mangano , Juan Rojo

Large fluctuations in the electron column density can occur during the reionization process. We investigate the possibility of deriving the electron density fluctuations through detailed mapping of the redshifted 21-cm emission from the…

天体物理学 · 物理学 2009-11-11 Gilbert Holder , Ilian T. Iliev , Garrelt Mellema

The measurement of absolutely normalized cross sections for high-energy scattering processes is an important reference for theoretical models. This paper discusses the first determination of the luminosity for data of the COMPASS…

高能物理 - 实验 · 物理学 2019-08-14 C. Höppner

During cosmic reionization, the 21-cm brightness fluctuations were highly non-Gaussian, and complementary statistics can be extracted from the distribution of pixel brightness temperatures that are not derivable from the 21-cm power…

宇宙学与河外天体物理 · 物理学 2012-09-27 Tony Pan , Rennan Barkana

The ratio of the cross sections for inclusive isolated-photon production in $pp$ collisions at centre-of-mass energies of 13 and 8 TeV is measured using the ATLAS detector at the LHC. The integrated luminosities of the 13 TeV and 8 TeV…

高能物理 - 实验 · 物理学 2019-05-31 ATLAS Collaboration

We propose a new, two-stage algorithm for inverting strong gravitational lenses. The key to the algorithm is decoupling the effects of lens magnification and intrinsic structure in the background source in the appearance of lensed arcs.…

天体物理学 · 物理学 2007-05-23 P. Newbury , G. G. Fahlman

Fourier ptychographic microscopy (FPM) is a recently proposed quantitative phase imaging technique with high resolution and wide field-of-view (FOV). In current FPM imaging platforms, systematic error sources come from the aberrations, LED…

仪器与探测器 · 物理学 2017-09-18 An Pan , Yan Zhang , Tianyu Zhao , Zhaojun Wang , Dan Dan , Baoli Yao

The Facility for Antiproton and Ion Research (FAIR) in Darmstadt will provide unique research opportunities for the investigation of fundamental open questions related to nuclear physics and astrophysics, including the exploration of QCD…

核实验 · 物理学 2020-05-08 Peter Senger

We develop a new method of combining cluster observables (number counts and cluster-cluster correlation functions) and stacked weak lensing signals of background galaxy shapes, both of which are available in a wide-field optical imaging…

宇宙学与河外天体物理 · 物理学 2015-03-17 Masamune Oguri , Masahiro Takada

We have analysed ~24 square degrees of R_C-band imaging data from the Red-Sequence Cluster Survey (RCS), and measured the excess correlations between galaxy ellipticities on scales ranging from 1 to 30 arcminutes. We have used data from two…

We study the time variation of the apparent flux of cosmological point sources due to the transient weak lensing by dark matter microhaloes. Assuming a transverse motion of microhaloes with respect to our line of sight, we derive the…

宇宙学与河外天体物理 · 物理学 2015-06-17 Sohrab Rahvar , Shant Baghram , Niayesh Afshordi
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