Recently proposed Future Circular Collider-based muon–proton colliders will allow for investigating lepton–hadron interactions at the highest center-of-mass energy. In this study, we investigate the potential of these colliders for a four-fermion contact interactions search. Regarding the constructive and destructive interferences of contact interactions, we estimated discovery, observation, and exclusion limits on the compositeness scale for the left–left, right–right, left–right, and right–left helicity structures. In this regard, we obtained compositeness scales for the left–left helicity structure at $\sqrt {s} = 63.2$ TeV FCC-based $\mu p$ collider with the 100 fb$^{-1}$ integrated luminosity as $225.7\pm 1.9$% TeV (discovery), $269.0\pm 2.0$% TeV (observation), and $311.3\pm 2.1$% TeV (exclusion). This study’s findings show that the FCC-based $\mu p$ colliders have great potential for investigating four-fermion contact interactions.

Türkiye

Gural Aydin

Yusuf Oguzhan Günaydin

Mehmet Türker Tarakcioglu

Mehmet Sahin

Saleh Sultansoy

Contact Interactions at Future Circular Collider Based Muon–Proton Colliders

Resonant production of excited <math id="M4"><mrow><mi>u</mi></mrow></math> and <math id="M5"><mrow><mi>d</mi></mrow></math> quarks at the Future Circular Collider and Super Proton-Proton Collider has been researched. Dominant jet-jet decay mode has been considered. It is shown that FCC and SppC have great potential for discovery of excited <math id="M6"><mrow><mi>u</mi></mrow></math> (<math id="M7"><mrow><mi>d</mi></mrow></math>) quark: up to 44.1 (36.3) and 58.4 (47.8) TeV masses, respectively. For degenerate case (<math id="M8"><mrow><msub><mrow><mi>M</mi></mrow><mrow><msup><mrow><mi>u</mi></mrow><mrow><mo>⋆</mo></mrow></msup></mrow></msub></mrow></math> = <math id="M9"><mrow><msub><mrow><mi>M</mi></mrow><mrow><msup><mrow><mi>d</mi></mrow><mrow><mo>⋆</mo></mrow></msup></mrow></msub></mrow></math>), these values are 45.9 and 60.9 TeV, respectively. This discovery will also afford an opportunity to determine the compositeness scale up to multi-PeV level.

Ahmet Nuri Akay

Azerbaijan

Search for Excited And Quarks in Dijet Final States at Future Colliders

Several Beyond the Standard Model theories proposed that fermions might have composite substructure. The existence of excited quarks is going to be the noticeable proof for the compositeness of Standard Model fermions. For this reason, excited quarks have been investigated by phenomenological and experimental high-energy physicists at various collider options for the last few decades. The Future Circular Collider (FCC) has been recently planned as particle accelerator to be established at CERN. Beside the $\sqrt{s}=100$~TeV proton--proton collisions, the FCC includes electron--positron and electron--proton collision options. Construction of linear $e^- e^+$ colliders (or dedicated e-linac) tangential to the FCC will afford an opportunity to handle multi-TeV $ep$ and $\gamma p$ collisions. In this respect, we executed a simulation of the resonance production of the excited $u$ quark at the FCC-based $\gamma p$ colliders with choosing both the polarized and unpolarized photon beams. The findings revealed that the chirality structure of the $q^*$--$q$--$\gamma$ vertex can be determined by the photon beam polarization. The attainable mass limits of the excited $u$ quark reached the highest values when the polarized photon beam was chosen. In addition, the ultimate compositeness scale values can be handled by appropriate choice of the photon beam polarization.

Resonance Production of Excited $u$ Quark at FCC-based $\gamma p$ Colliders

Main parameters of Super proton-proton Collider (SppC) based lepton-proton colliders are estimated. For electron beam parameters, highest energy International Linear Collider (ILC) and Plasma Wake Field Accelerator-Linear Collider (PWFA-LC) options are taken into account. For muon beams, 1.5 TeV and 3 TeV center of mass energy muon collider parameters are used. In addition, ultimate <math id="M1"><mi>μ</mi><mi>p</mi></math> collider which assumes construction of additional 50 TeV muon ring in the SppC tunnel is considered. It is shown that luminosity values exceeding <math id="M2"><mn>1</mn><msup><mrow><mn>0</mn></mrow><mrow><mn>32</mn></mrow></msup><mo> </mo><mi>c</mi><msup><mrow><mi>m</mi></mrow><mrow><mo>-</mo><mn>2</mn></mrow></msup><mo> </mo><msup><mrow><mi>s</mi></mrow><mrow><mo>-</mo><mn>1</mn></mrow></msup></math> can be achieved with moderate upgrade of the SppC proton beam parameters. Physics search potential of proposed lepton-proton colliders is illustrated by considering small Björken <math id="M3"><mrow><mi>x</mi></mrow></math> region as an example of SM physics and resonant production of color octet leptons as an example of BSM physics.

Umit Kaya

Ali Can Canbay

Bora Ketenoglu

Bilgehan Baris Oner

SppC Based Energy Frontier Lepton-Proton Colliders: Luminosity and Physics

The prompt and non-prompt production cross-sections for ψ (2S) mesons are measured using 2.1 fb −1 of pp collision data at a centre-of-mass energy of 7 TeV recorded by the ATLAS experiment at the LHC. The measurement exploits the ψ (2S) → J/ψ (→ μ + μ − ) π + π − decay mode, and probes ψ (2S) mesons with transverse momenta in the range 10 ≤ p T &lt; 100 GeV and rapidity | y | &lt; 2 . 0. The results are compared to other measurements of ψ (2S) production at the LHC and to various theoretical models for prompt and non-prompt quarkonium production.

France

Georges Aad

United States

Brad Abbott

China

Jalal Abdallah

Samah Abdel Khalek

Ovsat Abdinov

Netherlands

Rosemarie Aben

Babak Abi

Maris Abolins

Canada

Ossama AbouZeid

Israel

Halina Abramowicz

Henso Abreu

CERN

Ricardo Abreu

Sweden

Yiming Abulaiti

United Kingdom

Bobby Samir Acharya

Poland

Leszek Adamczyk

David Adams

Jahred Adelman

Germany

Stefanie Adomeit

Tim Adye

Montenegro

Tatjana Agatonovic-Jovin

Spain

Juan Antonio Aguilar-Saavedra

Switzerland

Marco Agustoni

Steven Ahlen

Faig Ahmadov

Italy

Giulio Aielli

Henrik Akerstedt

Torsten Paul Ake Åkesson

Japan

Ginga Akimoto

Russia

Andrei Akimov

Gian Luigi Alberghi

Justin Albert

Solveig Albrand

Argentina

Maria Josefina Alconada Verzini

Martin Aleksa

Igor Aleksandrov

Romania

Calin Alexa

Gideon Alexander

Gauthier Alexandre

Greece

Theodoros Alexopoulos

Muhammad Alhroob

Gianluca Alimonti

Lion Alio

John Alison

Benedict Allbrooke

Lee John Allison

Phillip Allport

John Almond

Alberto Aloisio

Denmark

Alejandro Alonso

Francisco Alonso

Cristiano Alpigiani

Andrew David Altheimer

Barbara Alvarez Gonzalez

Mariagrazia Alviggi

Katsuya Amako

Brazil

Yara Amaral Coutinho

Christoph Amelung

Dante Amidei

Portugal

Susana Patricia Amor Dos Santos

Antonio Amorim

Simone Amoroso

Nir Amram

Glenn Amundsen

Christos Anastopoulos

Lucian Stefan Ancu

Nansi Andari

Timothy Andeen

Christoph Falk Anders

Gabriel Anders

Kelby Anderson

Attilio Andreazza

George Victor Andrei

Xabier Anduaga

Stylianos Angelidakis

Ivan Angelozzi

Philipp Anger

Aaron Angerami

Francis Anghinolfi

Alexey Anisenkov

Nuno Anjos

Alberto Annovi

Ariadni Antonaki

Mario Antonelli

Alexey Antonov

Slovakia

Jaroslav Antos

Fabio Anulli

Masato Aoki

Ludovica Aperio Bella

Rudi Apolle

Giorgi Arabidze

Ignacio Aracena

Yasuo Arai

Juan Pedro Araque

Ayana Arce

Jean-Francois Arguin

Spyridon Argyropoulos

Metin Arik

Aaron James Armbruster

Olivier Arnaez

Vanessa Arnal

Measurement of the production cross-section of ψ (2S) → J/ψ (→ μ + μ − ) π + π − in pp collisions at s $$ \sqrt{s} $$ = 7 TeV at ATLAS