在能量为1.5至20 GeV的中微子和反中微子束中，测量π(±)在碳上的相干产生。
Measurement of coherent production of π(±) in neutrino and antineutrino beams on carbon from Eν of 1.5 to 20 GeV.
作者信息
Higuera A, Mislivec A, Aliaga L, Altinok O, Bercellie A, Betancourt M, Bodek A, Bravar A, Brooks W K, Budd H, Butkevich A, Carneiro M F, Castromonte C M, Christy M E, Chvojka J, da Motta H, Devan J, Dytman S A, Díaz G A, Eberly B, Felix J, Fields L, Fine R, Fiorentini G A, Gallagher H, Gomez A, Gran R, Harris D A, Hurtado K, Kleykamp J, Kordosky M, Le T, Maher E, Manly S, Mann W A, Marshall C M, Martinez Caicedo D A, McFarland K S, McGivern C L, McGowan A M, Messerly B, Miller J, Morfín J G, Mousseau J, Muhlbeier T, Naples D, Nelson J K, Norrick A, Osta J, Palomino J L, Paolone V, Park J, Patrick C E, Perdue G N, Ransome R D, Ray H, Ren L, Rodrigues P A, Ruterbories D, Schellman H, Schmitz D W, Snider F D, Solano Salinas C J, Tagg N, Tice B G, Valencia E, Walton T, Wolcott J, Wospakrik M, Zavala G, Zhang D, Ziemer B P
机构信息
University of Rochester, Rochester, New York 14627, USA and Campus León y Campus Guanajuato, Universidad de Guanajuato, Lascurain de Retana No. 5, Colonia Centro, Guanajuato 36000, Guanajuato, México.
University of Rochester, Rochester, New York 14627, USA.
出版信息
Phys Rev Lett. 2014 Dec 31;113(26):261802. doi: 10.1103/PhysRevLett.113.261802. Epub 2014 Dec 23.
Neutrino-induced coherent charged pion production on nuclei νμA→μ(±)π(∓)A is a rare, inelastic interaction in which a small squared four-momentum |t| is transferred to the recoil nucleus, leaving it intact in the reaction. In the scintillator tracker of MINERvA, we remove events with evidence of particles from nuclear breakup and reconstruct |t| from the final-state pion and muon. We select low |t| events to isolate a sample rich in coherent candidates. By selecting low |t| events, we produce a model-independent measurement of the differential cross section for coherent scattering of neutrinos and antineutrinos on carbon. We find poor agreement with the predicted kinematics in neutrino generators used by current oscillation experiments.
中微子在原子核上诱发的相干带电π介子产生过程νμA→μ(±)π(∓)A是一种罕见的非弹性相互作用，其中一个小的四动量平方|t|被转移到反冲核上，使其在反应中保持完整。在MINERvA的闪烁体追踪器中，我们去除有核破裂产生粒子迹象的事件，并根据末态π介子和μ子重建|t|。我们选择低|t|事件以分离出富含相干候选事例的样本。通过选择低|t|事件，我们对中微子和反中微子在碳上的相干散射微分截面进行了与模型无关的测量。我们发现与当前振荡实验所使用的中微子发生器中预测的运动学存在很大差异。
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