15 documents found, page 1 of 2
Azimuthal asymmetries of charged hadrons produced in high-energy muon scatterin...
COMPASS collaboration (225 authors); Bordalo, P; Franco, C; Nunes, A S; Quaresma, M; Quintans, C; Ramos, S; Silva, L; Stolarski, MSingle hadron azimuthal asymmetries in the cross sections of positive and negative hadron production in muon semi-inclusive deep inelastic scattering off longitudinally polarised deuterons are determined using the 2006 COMPASS data and also all deuteron COMPASS data. For each hadron charge, the dependence of the azimuthal asymmetry on the hadron azimuthal angle $\phi$ is obtained by means of a five-parameter fi...
Resonance Production and $\pi\pi$ S-wave in $\pi^- + p \rightarrow \pi^- \pi^- ...
COMPASS collaboration (210 authors); Bordalo, P; Franco, C; Nunes, A S; Quaresma, M; Quintans, C; Ramos, S; Silva, L; Stolarski, MThe COMPASS collaboration has collected the currently largest data set on diffractively produced π-π-π+ final states using a negative pion beam of 190 GeV/c momentum impinging on a stationary proton target. This data set allows for a systematic partial-wave analysis in 100 bins of three-pion mass, 0.5<m3π<2.5 GeV/c2, and in 11 bins of the reduced four-momentum transfer squared, 0.1<t′<1.0 (GeV/c)2. This two-...
Sivers asymmetry extracted in SIDIS at the hard scales of the Drell–Yan process...
COMPASS collaboration (225 authors); Bordalo, P; Franco, C; Nunes, A S; Quaresma, M; Quintans, C; Ramos, S; Silva, L; Stolarski, MEight proton transverse-spin-dependent azimuthal asymmetries are extracted in four regions of the photon virtuality Q2 from the COMPASS 2010 semi-inclusive hadron measurements in deep inelastic muon–nucleon scattering. These Q2 regions correspond to the four regions of the di-muon mass Q2 used in the ongoing analyses of the COMPASS Drell–Yan measurements, which allows for a future direct comparison of the nucle...
Longitudinal double spin asymmetries in single hadron quasi-real photoproductio...
COMPASS collaboration (210 authors); Bordalo, P; Franco, C; Nunes, A S; Quaresma, M; Quintans, C; Ramos, S; Silva, L; Stolarski, MWe measured the longitudinal double spin asymmetries $A_{LL}$ for single hadron muo-production off protons and deuterons at photon virtuality $Q^2$ < 1(GeV/$\it c$)$^2$ for transverse hadron momenta $p_T$ in the range 0.7 GeV/$\it c$ to 4 GeV/$\it c$ . They were determined using COMPASS data taken with a polarised muon beam of 160 GeV/$\it c$ or 200 GeV/$\it c$ impinging on polarised $\mathrm{{}^6LiD}$ or $\mat...
Collins and Sivers asymmetries in muonproduction of pions and kaons off transve...
COMPASS collaboration (209 authors); Bordalo, P; Franco, C; Nunes, A S; Quaresma, M; Quintans, C; Ramos, S; Silva, L; Stolarski, MMeasurements of the Collins and Sivers asymmetries for charged pions and charged and neutral kaons produced in semi-inclusive deep-inelastic scattering of high energy muons off transversely polarised protons are presented. The results were obtained using all the available COMPASS proton data, which were taken in the years 2007 and 2010. The Collins asymmetries exhibit in the valence region a non-zero signal for...
Search for exclusive photoproduction of Z$_c^{\pm}$(3900) at COMPASS
COMPASS collaboration (209 authors); Bordalo, P; Franco, C; Nunes, Ana Sofia; Quaresma, M; Quintans, C; Ramos, S; Silva, L; Stolarski, MA search for the exclusive production of the Zc±(3900) hadron by virtual photons has been performed in the channel Zc±(3900)→J/ψπ± . The data cover the range from 7 GeV to 19 GeV in the centre-of-mass energy of the photon–nucleon system. The full set of the COMPASS data set collected with a muon beam between 2002 and 2011 has been used. An upper limit for the ratio BR(Zc±(3900)→J/ψπ±)×σγN→Zc±(3900)N/σγN→J/ψN of...
Transverse target spin asymmetries in exclusive $\rho^0$ muoproduction
COMPASS collaboration (213 authors); Bordalo, P; Franco, C; Nunes, A.S; Quaresma, M; Quintans, C; Ramos, S; Silva, L; Stolarski, MExclusive production of $\rho^0$ mesons was studied at the COMPASS experiment by scattering 160 GeV/$c$ muons off transversely polarised protons. Five single-spin and three double-spin azimuthal asymmetries were measured as a function of $Q^2$, $x_{Bj}$, or $p_{T}^{2}$. The $\sin \phi_S$ asymmetry is found to be $-0.019 \pm 0.008(stat.) \pm 0.003(syst.)$. All other asymmetries are also found to be of small magn...
Aktualny stan efektywnosci energetycznej w rolnictwie Unii Europejskiej (The cu...
Golaszewski, J; de Visser, C; Brodzinski, Z; Myhan, R; Olba-Ziety, E; Stolarski, M; Buisonjé, F; Ellen, H; Stanghellini, C; van der Voort, MEnergy efficiency is the goal of efforts to reduce the amount of energy required to provide products and services. The general term "energy efficiency", when applied to agriculture,reflects changes in technology, governmental and EC policies – including the Common Agricultural Policy, climate change on a broad scale and local weather patterns, and farming management practices. There is not a single measure to d...
Otoczenie zewnetrzne efektywnosci energetycznej w rolnictwie – studium przypadk...
Golaszewski, J; de Visser, C; Lutsyuk, C; Stolarski, M; Brodzinski, Z; Olba-Ziety, E; Myhan, R; Mikkola, H; Ahokas, J; Jokiniemi, T; Rajaniemi, MUntil recently energy efficiency in agriculture has received little attention. Nevertheless, energy consumption in agriculture is considerable, especially when indirect energy use is taken into account. AGREE has the objective of showing the potential of short term energy efficiency gains and the promise of a long term potential. Environmental effects of savings on direct and indirect energy use in agriculture ...
Dzialania energooszczedne w rolnictwie (Energy saving measures in agriculture)
Golaszewski, J; de Visser, C; Stolarski, M; Brodzinski, Z; Olba-Ziety, E; Myhan, R; Mikkola, H; Ahokas, J; Jokiniemi, T; Rajaniemi, M; Meyer-Aurich, AThe reduction of energy inputs in agricultural production is a process of practical implementation of a set of energy saving (ES) measures associated with a given type of production, farm infrastructure and managerial or organizational activities. In six national reports from Finland, Germany, Greece, the Netherlands, Poland and Portugal for 13 subsectors of agriculture, 481 ES measures in total were identified...