<p>We present flux-integrated charged-current <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><msub><mi>ν</mi><mi>μ</mi></msub></math> cross-section measurements on argon for final states containing exactly one <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><msup><mi>π</mi><mo>±</mo></msup></math> and no other hadrons except nucleons. The analysis uses data from the MicroBooNE experiment in the Booster Neutrino Beam, corresponding to <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mn>1.11</mn><mo>×</mo><msup><mn>10</mn><mn>21</mn></msup></math> protons on target. Total and single-differential cross-section measurements are provided within a phase space restricted to muon momenta above 150 MeV, pion momenta above 100 MeV, and muon-pion opening angles smaller than 2.65 rad. Differential cross sections are reported with respect to the scattering angles of the muon and pion relative to the beam direction, their momenta, and their combined opening angle. The differential cross section with respect to muon momentum is based on a subset of selected events with the muon track fully contained in the detector, whereas the cross section with respect to pion momentum is based on a subset of selected events rich in pions that have not hadronically scattered on the argon before coming to rest. The latter has not been measured on argon before. The total cross section is measured as <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mo stretchy="false">(</mo><mn>3.75</mn><mo>±</mo><mn>0.07</mn><mrow><mo stretchy="false">(</mo><mi>stat</mi><mo stretchy="false">)</mo></mrow><mo>±</mo><mn>0.80</mn><mrow><mo stretchy="false">(</mo><mi>syst</mi><mo stretchy="false">)</mo></mrow><mo stretchy="false">)</mo><mo>×</mo><msup><mn>10</mn><mrow><mo>−</mo><mn>38</mn></mrow></msup><mtext> </mtext><mtext> </mtext><msup><mrow><mi>cm</mi></mrow><mn>2</mn></msup><mo>/</mo><mi>Ar</mi></math> at a mean energy of approximately 0.8 GeV. Comparisons of the measured cross sections with predictions from multiple neutrino-nucleus interaction generators show good overall agreement, except at very forward muon angles.</p>

United States

P. Abratenko

D. Andrade Aldana

United Kingdom

L. Arellano

J. Asaadi

Israel

A. Ashkenazi

S. Balasubramanian

B. Baller

A. Barnard

G. Barr

D. Barrow

J. Barrow

V. Basque

J. Bateman

B. Behera

O. Benevides Rodrigues

S. Berkman

A. Bhat

M. Bhattacharya

V. Bhelande

M. Bishai

A. Blake

B. Bogart

T. Bolton

M.B. Brunetti

L. Camilleri

D. Caratelli

F. Cavanna

G. Cerati

A. Chappell

Y. Chen

J.M. Conrad

M. Convery

L. Cooper-Troendle

Spain

J.I. Crespo-Anadón

R. Cross

M. Del Tutto

S.R. Dennis

P. Detje

A. Devitt

Switzerland

R. Diurba

Z. Djurcic

K. Duffy

S. Dytman

B. Eberly

P. Englezos

A. Ereditato

J.J. Evans

C. Fang

W. Foreman

B.T. Fleming

D. Franco

A.P. Furmanski

F. Gao

D. Garcia-Gamez

S. Gardiner

G. Ge

S. Gollapinni

E. Gramellini

P. Green

H. Greenlee

L. Gu

W. Gu

R. Guenette

P. Guzowski

L. Hagaman

M.D. Handley

O. Hen

C. Hilgenberg

G.A. Horton-Smith

A. Hussain

B. Irwin

M.S. Ismail

C. James

China

X. Ji

J.H. Jo

R.A. Johnson

D. Kalra

G. Karagiorgi

W. Ketchum

M. Kirby

T. Kobilarcik

K. Kumar

N. Lane

J.Y. Li

Y. Li

K. Lin

B.R. Littlejohn

L. Liu

W.C. Louis

X. Luo

T. Mahmud

N. Majeed

C. Mariani

J. Marshall

N. Martinez

D.A. Martinez Caicedo

S. Martynenko

A. Mastbaum

I. Mawby

N. McConkey

Measurement of single charged pion production in charged-current <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><msub><mi>ν</mi><mi>μ</mi></msub></math>-Ar interactions with the MicroBooNE detector

<p>We present a microscopic calculation of two-particle–two-hole meson-exchange current response functions in asymmetric nuclei, with particular emphasis on the <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi>Ar</mi></mrow><mprescripts></mprescripts><none></none><mrow><mn>40</mn></mrow></mmultiscripts></mrow></math> nucleus. Employing a relativistic mean-field and relativistic Fermi gas framework, we compute the nuclear response for <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi>Ar</mi></mrow><mprescripts></mprescripts><none></none><mrow><mn>40</mn></mrow></mmultiscripts></mrow></math> and compare it with that of the symmetric <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi>Ca</mi></mrow><mprescripts></mprescripts><none></none><mrow><mn>40</mn></mrow></mmultiscripts></mrow></math> nucleus, analyzing the role of proton-neutron imbalance. The model incorporates distinct proton and neutron Fermi momenta to accurately capture the nuclear dynamics of systems with <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>Z</mi><mo>≠</mo><mi>N</mi></math>. Our results indicate that using <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi>Ca</mi></mrow><mprescripts></mprescripts><none></none><mrow><mn>40</mn></mrow></mmultiscripts></mrow></math> as a proxy for <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi>Ar</mi></mrow><mprescripts></mprescripts><none></none><mrow><mn>40</mn></mrow></mmultiscripts></mrow></math> leads to a systematic error of approximately 10%. Additionally, we propose an asymmetric scaling formula to obtain the two-particle–two-hole response for arbitrary nuclei from the <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi mathvariant="normal">C</mi></mrow><mprescripts></mprescripts><none></none><mrow><mn>12</mn></mrow></mmultiscripts></mrow></math> response, improving the description of asymmetric nuclei. Finally, we benchmark our predictions against inclusive electron scattering and neutrino cross sections.</p>

V.L. Martinez-Consentino

J. Segovia

J.E. Amaro

Microscopic calculation of two-particle-two-hole meson-exchange currents in <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi>Ar</mi></mrow><mprescripts></mprescripts><none></none><mrow><mn>40</mn></mrow></mmultiscripts></mrow></math> and asymmetric scaling properties for neutrino and electron scattering

In this study, we investigate the effect of the Lorentz invariance violation on the Casimir energy and pressure of the massive fermion field in the presence of compact dimension with topological <inline-formula><tex-math id='TM0001' notation='LaTeX'>$R^4\times S^1$</tex-math></inline-formula>, referring to the Kaluza&#8211;Klein model. In the system, the Dirac field is confined between two parallel plates with the geometry described by MIT bag boundary conditions, and the compactified dimension satisfies quasiperiodic boundary conditions. We investigate two directions of the Lorentz violation, namely, space- and time-like. The results reveal that in the space-like vector case, the Lorentz violation&#8217;s strength and the extra dimension affect the Casimir energy and pressure. In contrast, in the time-like vector case, they are only affected by the extra dimension. We also propose an indirect method to estimate the size of the extra dimension by comparing the frequency shift of the massless fermionic case to that of the scaled experimental data for the electromagnetic field.

Indonesia

Ar Rohim

Apriadi Salim Adam

Fermionic Casimir Effect in the Presence of Compact Dimension in Field Theory with Lorentz Invariance Violation

This paper presents results on multiplicity fluctuations of positively and negatively charged hadrons as well as net-electric charge fluctuations measured in central Ar+Sc interactions at beam momenta 13$\textit{A}$, 19$\textit{A}$, 30$\textit{A}$, 40$\textit{A}$, 75$\textit{A}$, and 150 $$A\,\hbox {GeV}\!/\!c$$ . The fluctuation analysis is one of the tools to search for the predicted critical point of strongly interacting matter. Results are corrected for the experimental biases and quantified using cumulant ratios. In most instances, multiplicity and net-charge distributions appear narrower than the corresponding Poisson or Skellam distributions. Cumulant ratios are compared with the model predictions, which provide a qualitative description that aligns with observations for positively and negatively charged particles. The obtained results are also compared to earlier NA61/SHINE results from inelastic $\textit{p+p}$ interactions in the same analysis acceptance.

Poland

H. Adhikary

P. Adrich

K. Allison

Germany

N. Amin

E. Andronov

Norway

I.C. Arsene

M. Bajda

Y. Balkova

D. Battaglia

A. Bazgir

S. Bhosale

M. Bielewicz

France

A. Blondel

Bulgaria

M. Bogomilov

Y. Bondar

W. Bryliński

J. Brzychczyk

Russia

M. Buryakov

A. Camino

Y. Chandak

Serbia

M. Ćirković

Hungary

M. Csanád

J. Cybowska

T. Czopowicz

C. Dalmazzone

N. Davis

A. Dmitriev

P. Doetinchem

W. Dominik

J. Dumarchez

R. Engel

G. Feofilov

L. Fields

Z. Fodor

Japan

M. Friend

M. Gaździcki

K. Gollwitzer

O. Golosov

V. Golovatyuk

M. Golubeva

K. Grebieszkow

F. Guber

P. Hurh

S. Ilieva

A. Ivashkin

N. Karpushkin

M. Kiełbowicz

V. Kireyeu

R. Kolesnikov

D. Kolev

Y. Koshio

S. Kowalski

B. Kozłowski

A. Krasnoperov

W. Kucewicz

M. Kuchowicz

M. Kuich

A. László

M. Lewicki

G. Lykasov

J. Lyon

V. Lyubushkin

M. Maćkowiak-Pawłowska

B. Maksiak

A. Malakhov

A. Marcinek

A. Marino

H.J. Mathes

T. Matulewicz

V. Matveev

G. Melkumov

A. Merzlaya

Ł.. Mik

Multiplicity and net-electric charge fluctuations in central Ar+Sc interactions at 13$\textit{A}$, 19$\textit{A}$, 30$\textit{A}$, 40$\textit{A}$, 75$\textit{A}$, and 150 $$A\,\hbox {GeV}\!/\!c$$ beam momenta measured by NA61/SHINE at the CERN SPS