نتایج جستجو برای: spin asymmetry

تعداد نتایج: 156923  

2016
J. E. Prieto Gong Chen A. K. Schmid J. de la Figuera

Thin epitaxial films of Tb metal were grown on a clean W(110) substrate in ultrahigh vacuum and studied in situ by low-energy electron microscopy. Annealed films present magnetic contrast in spin-polarized low-energy electron microscopy. The energy dependence of the electron reflectivity was determined and a maximum value of its spin asymmetry of about 1% was measured. The magnetization directi...

2009
M. Sarsour

We report measurements of the longitudinal double spin asymmetry for inclusive jet production using polarized p+p collisions at √ s = 200 GeV at RHIC. Results from the 2005 and 2006 runs are presented. These results set substantial new constraints on the polarized gluon distribution in the proton over the kinematic range 0.02 < x < 0.3, when compared to next-to-leading order global analyses of ...

1999
G. P. Škoro

− The prompt photon production in ~p − ~p collisions at high energies is studied. Double-spin asymmetry ALL of the process is calculated by using Monte Carlo code SPHINX. A possibility to discriminate the spin-dependent gluon distributions and to determine sign of ∆G is discussed. Detailed study of expected background, such as π production and decay, is given. The predictions for the longitudin...

1999
B. Dressler K. Goeke M. V. Polyakov P. Schweitzer M. Strikman C. Weiss

We investigate the role of the flavor asymmetry of the nucleon's polarized antiquark distributions in Drell–Yan lepton pair production in polarized nucleon–nucleon collisions at HERA (fixed–target) and RHIC energies. It is shown that the large polarized antiquark flavor asymmetry predicted by model calculations in the large–N c limit (chiral quark–soliton model) has a dramatic effect on the dou...

2009
Yuji Koike

We discuss the single-spin asymmetry in semi-inclusive DIS, ep → eπX, based on the twist-3 mechanism in the collinear factorization relevant for the pion production with the large transverse-momentum. This updates our previous study by including, in particular, the contributions induced by the novel partonic subprocesses, and allows us to derive the entire formula for the corresponding single-s...

Journal: :Physical review letters 2006
S Chen H Avakian V D Burkert P Eugenio G Adams M Amarian P Ambrozewicz M Anghinolfi G Asryan H Bagdasaryan N Baillie J P Ball N A Baltzell S Barrow V Batourine M Battaglieri K Beard I Bedlinskiy M Bektasoglu M Bellis N Benmouna B L Berman A S Biselli B E Bonner S Bouchigny S Boiarinov P Bosted R Bradford D Branford W J Briscoe W K Brooks S Bültmann C Butuceanu J R Calarco S L Careccia D S Carman B Carnahan A Cazes P L Cole P Collins P Coltharp D Cords P Corvisiero D Crabb H Crannell V Crede J P Cummings R DeMasi R DeVita E De Sanctis P V Degtyarenko H Denizli L Dennis A Deur K V Dharmawardane K S Dhuga C Djalali G E Dodge J Donnelly D Doughty M Dugger S Dytman O P Dzyubak H Egiyan K S Egiyan L El Fassi L Elouadrhiri R Fatemi G Fedotov G Feldman R J Feuerbach T A Forest H Funsten M Garçon G Gavalian G P Gilfoyle K L Giovanetti F X Girod J T Goetz E Golovatch A Gonenc R W Gothe K A Griffioen M Guidal M Guillo N Guler L Guo V Gyurjyan C Hadjidakis K Hafidi H Hakobyan R S Hakobyan J Hardie D Heddle F W Hersman K Hicks I Hleiqawi M Holtrop M Huertas C E Hyde-Wright Y Ilieva D G Ireland B S Ishkhanov E L Isupov M M Ito D Jenkins H S Jo K Joo H G Juengst C Keith J D Kellie M Khandaker K Y Kim K Kim W Kim A Klein F J Klein M Klusman M Kossov L H Kramer V Kubarovsky J Kuhn S E Kuhn S V Kuleshov J Lachniet J M Laget J Langheinrich D Lawrence Ji Li A C S Lima K Livingston H Lu K Lukashin M MacCormick N Markov S McAleer B McKinnon J W C McNabb B A Mecking M D Mestayer C A Meyer T Mibe K Mikhailov R Minehart M Mirazita R Miskimen V Mokeev L Morand S A Morrow M Moteabbed J Mueller G S Mutchler P Nadel-Turonski J Napolitano R Nasseripour N Natasha S Niccolai G Niculescu I Niculescu B B Niczyporuk M R Niroula R A Niyazov M Nozar G V O'Rielly M Osipenko A I Ostrovidov K Park E Pasyuk C Paterson S A Philips J Pierce N Pivnyuk D Pocanic O Pogorelko E Polli I Popa S Pozdniakov B M Preedom J W Price Y Prok D Protopopescu L M Qin B A Raue G Riccardi G Ricco M Ripani B G Ritchie F Ronchetti G Rosner P Rossi D Rowntree P D Rubin F Sabatié C Salgado J P Santoro V Sapunenko R A Schumacher V S Serov Y G Sharabian J Shaw N V Shvedunov A V Skabelin E S Smith L C Smith D I Sober A Stavinsky S S Stepanyan S Stepanyan B E Stokes P Stoler I I Strakovsky S Strauch R Suleiman M Taiuti D J Tedeschi U Thoma A Tkabladze S Tkachenko L Todor C Tur M Ungaro M Vanderhaeghen M F Vineyard A V Vlassov D P Watts L B Weinstein D P Weygand M Williams E Wolin M H Wood A Yegneswaran J Yun L Zana J Zhang B Zhao Z Zhao

The longitudinal target-spin asymmetry AUL for the exclusive electroproduction of high-energy photons was measured for the first time in ep-->e;'pgamma. The data have been accumulated at JLab with the CLAS spectrometer using 5.7 GeV electrons and a longitudinally polarized NH3 target. A significant azimuthal angular dependence was observed, resulting from the interference of the deeply virtual ...

2003
E. M. Darwish

Incoherent photoproduction of pions on the deuteron in the first resonance region is investigated with special emphasis on single-spin asymmetries. For the elementary pion production operator an effective Lagrangian model which includes the standard pseudovector Born terms and a resonance contribution from the ∆(1232)-excitation is used. Single-spin asymmetries, both for charged and neutral pio...

2011
Z. Y. Zhu Y. C. Cheng U. Schwingenschlögl

Fully relativistic first-principles calculations based on density functional theory are performed to study the spin-orbit-induced spin splitting in monolayer systems of the transition-metal dichalcogenides MoS2, MoSe2, WS2, and WSe2. All these systems are identified as direct-band-gap semiconductors. Giant spin splittings of 148–456 meV result from missing inversion symmetry. Full out-of-plane ...

Journal: :International Journal of Modern Physics: Conference Series 2012

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید