20171208 07:26 
Muoproduction of exotic charmonia at COMPASS
/ Guskov, A. (Dubna, JINR)
/COMPASS Collaboration
Exotic charmoniumlike states have been targeted by various experiments in the last 15 years, but their nature still is unknown. Photo(muo)production is a new promising instrument to study them. [...]
arXiv:1712.01345.
SISSA, 20171127  5 p.
 Published in : PoS: Hadron2017 (2018) , pp. 125
Fulltext: PDF; Preprint: PDF; External link: PoS server

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20171208 07:26 
First results from an extended freedisobar analysis at COMPASS
/ Krinner, Fabian (Munich, Tech. U.)
/COMPASS Collaboration
One of the goals of the COMPASS experiment is the precision study of lightmeson spectroscopy with data for various final states. With $46\times10^6$ exclusive events, the process $\pi^ p\to\pi^\pi^+\pi^ p$ constitutes the flagship channel. [...]
arXiv:1711.10828.
SISSA, 20171130  6 p.
 Published in : PoS: Hadron2017 (2018) , pp. 034
Fulltext: PDF; Preprint: PDF; External link: PoS server

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20171201 07:57 
Recent Results on LightMeson Spectroscopy from COMPASS
/ Wallner, Stefan (Munich, Tech. U.)
/COMPASS Collaboration
The main goal of the spectroscopy program at COMPASS is to explore the lightmeson spectrum below about $2\,\text{GeV}/c^2$ in diffractive production. Our flagship channel is the decay into three charged pions: $p + \pi^\to \pi^\pi^\pi^+ + p_\text{recoil}$, for which COMPASS has acquired the so far world's largest dataset of roughly $50\,\text{M}$ exclusive events using an $190\,\text{GeV}/c$ $\pi^$ beam. [...]
arXiv:1711.09782.
SISSA, 20171127  7 p.
 Published in : PoS: Hadron2017 (2018) , pp. 032
Fulltext: PDF; Preprint: PDF; External link: PoS server

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20170225 07:55 
The $t$dependence of the pure DVCS cross section at COMPASS
/ Joerg, Philipp (Freiburg U.)
/COMPASS Collaboration
The key reactions to study the Generalised Parton Distributions are Deeply Virtual Compton Scattering (DVCS) and Deeply Virtual Meson Production (DVMP). At COMPASS, these processes are investigated using a high intensity muon beam with a momentum of 160\,GeV/c and a 2.5\,mlong liquid hydrogen target. [...]
arXiv:1702.06315.
SISSA, 20161010  7 p.
 Published in : PoS: DIS2016 (2016) , pp. 235
Fulltext: PDF; Preprint: PDF; External links: PoS server; 00007 COMPASS results for the tslope parameter (\textbf{left}) and the extracted transverse size of the partonic distribution of the nucleon (\textbf{right}), compared with previous HERA measurements.; 00003 Exclusivity variables: The whole Monte Carlo estimate is shown in red while in grey only the $\pi^0$ contamination is shown. The variables $\Delta \varphi$, $\Delta p_{\bot}$ and $M_X^2$ are defined in equation \ref{eq_phi}\ref{eq_m} while $\Delta z_{A}$ encodes a reverse vertex pointing. The blue dotted lines indicate the applied cuts.; 00006 COMPASS results for the tslope parameter (\textbf{left}) and the extracted transverse size of the partonic distribution of the nucleon (\textbf{right}), compared with previous HERA measurements.; 00001 Exclusivity variables: The whole Monte Carlo estimate is shown in red while in grey only the $\pi^0$ contamination is shown. The variables $\Delta \varphi$, $\Delta p_{\bot}$ and $M_X^2$ are defined in equation \ref{eq_phi}\ref{eq_m} while $\Delta z_{A}$ encodes a reverse vertex pointing. The blue dotted lines indicate the applied cuts.; 00002 Exclusivity variables: The whole Monte Carlo estimate is shown in red while in grey only the $\pi^0$ contamination is shown. The variables $\Delta \varphi$, $\Delta p_{\bot}$ and $M_X^2$ are defined in equation \ref{eq_phi}\ref{eq_m} while $\Delta z_{A}$ encodes a reverse vertex pointing. The blue dotted lines indicate the applied cuts.; 00000 Exclusivity variables: The whole Monte Carlo estimate is shown in red while in grey only the $\pi^0$ contamination is shown. The variables $\Delta \varphi$, $\Delta p_{\bot}$ and $M_X^2$ are defined in equation \ref{eq_phi}\ref{eq_m} while $\Delta z_{A}$ encodes a reverse vertex pointing. The blue dotted lines indicate the applied cuts.; 00005 The $t$differential DVCS cross section as a function of $t$; 00004 Acceptance correction factors as a function of $t$, $Q^2$ and $\nu$.; Fulltext
In : 24th International Workshop on Deep Inelastic Scattering and related subjects, Hamburg, Germany, 11  15 Apr 2016, pp.235

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20160929 01:12 
Photons interacting with Hadrons at COMPASS
/ Friedrich, Jan Michael (Technische Universitaet Muenchen (DE))
/COMPASS NA58 Collaboration
COMPASS is a multipurpose experiment operated at CERN for investigations of the strong interaction from low to medium energy scales. At low energies, photonpion interactions provide input for understanding the effective dynamics of strongly bound states of quarks and gluons, most prominently the recent measurement of the polarisability of the charged pion. [...]
COMPASSPROC2016001.
Geneva : CERN, 2015  8.
Fulltext: PDF;

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