Measurement of the total cross section and ρ -parameter from elastic scattering in pp collisions at √s=13 TeV with the ATLAS detector

Autor: Aad, G, Abbott, B, Abbott, DC, Abeling, K, Abidi, SH, Aboulhorma, A, Abramowicz, H, Abreu, H, Abulaiti, Y, Abusleme Hoffman, AC, Acharya, BS, Achkar, B, Adam Bourdarios, C, Adamczyk, L, Adamek, L, Addepalli, SV, Adelman, J, Adiguzel, A, Adorni, S, Adye, T, Affolder, AA, Afik, Y, Agaras, MN, Agarwala, J, Aggarwal, A, Agheorghiesei, C, Aguilar-Saavedra, JA, Ahmad, A, Ahmadov, F, Ahmed, WS, Ahuja, S, Ai, X, Aielli, G, Aizenberg, I, Akbiyik, M, Åkesson, TPA, Akimov, AV, Al Khoury, K, Alberghi, GL, Albert, J, Albicocco, P, Alderweireldt, S, Aleksa, M, Aleksandrov, IN, Alexa, C, Alexopoulos, T, Alfonsi, A, Alfonsi, F, Alhroob, M, Ali, B, Ali, S, Aliev, M, Alimonti, G, Alkakhi, W, Allaire, C, Allbrooke, BMM, Allport, PP, Aloisio, A, Alonso, F, Alpigiani, C, Alunno Camelia, E, Alvarez Estevez, M, Alviggi, MG, Aly, M, Amaral Coutinho, Y, Ambler, A, Amelung, C, Ames, CG, Amidei, D, Amor Dos Santos, SP, Amoroso, S, Amos, KR, Ananiev, V, Anastopoulos, C, Andeen, T, Anders, JK, Andrean, SY, Andreazza, A, Angelidakis, S, Angerami, A, Anisenkov, AV, Annovi, A, Antel, C, Anthony, MT, Antipov, E, Antonelli, M, Antrim, DJA, Anulli, F, Aoki, M, Aoki, T, Aparisi Pozo, JA, Aparo, MA, Aperio Bella, L, Appelt, C, Aranzabal, N, Araujo Ferraz, V, Arcangeletti, C, Arce, ATH, Arena, E, Arguin, JF
Přispěvatelé: Aad, G [0000-0002-6665-4934], Abbott, B [0000-0002-5888-2734], Abbott, DC [0000-0002-7248-3203], Abeling, K [0000-0002-1002-1652], Abidi, SH [0000-0002-8496-9294], Aboulhorma, A [0000-0002-9987-2292], Abramowicz, H [0000-0001-5329-6640], Abreu, H [0000-0002-1599-2896], Abulaiti, Y [0000-0003-0403-3697], Abusleme Hoffman, AC [0000-0003-0762-7204], Acharya, BS [0000-0002-8588-9157], Achkar, B [0000-0002-0288-2567], Adam Bourdarios, C [0000-0002-2634-4958], Adamczyk, L [0000-0002-5859-2075], Adamek, L [0000-0003-1562-3502], Addepalli, SV [0000-0002-2919-6663], Adelman, J [0000-0002-1041-3496], Adiguzel, A [0000-0001-6644-0517], Adorni, S [0000-0003-3620-1149], Adye, T [0000-0003-0627-5059], Affolder, AA [0000-0002-9058-7217], Afik, Y [0000-0001-8102-356X], Agaras, MN [0000-0002-4355-5589], Agarwala, J [0000-0002-4754-7455], Aggarwal, A [0000-0002-1922-2039], Agheorghiesei, C [0000-0003-3695-1847], Aguilar-Saavedra, JA [0000-0002-5475-8920], Ahmad, A [0000-0001-8638-0582], Ahmed, WS [0000-0003-0128-3279], Ahuja, S [0000-0003-4368-9285], Ai, X [0000-0003-3856-2415], Aielli, G [0000-0002-0573-8114], Aizenberg, I [0000-0003-2150-1624], Akbiyik, M [0000-0002-7342-3130], Åkesson, TPA [0000-0003-4141-5408], Akimov, AV [0000-0002-2846-2958], Al Khoury, K [0000-0002-0547-8199], Alberghi, GL [0000-0003-2388-987X], Albert, J [0000-0003-0253-2505], Albicocco, P [0000-0001-6430-1038], Alderweireldt, S [0000-0002-8224-7036], Aleksa, M [0000-0002-1936-9217], Aleksandrov, IN [0000-0001-7381-6762], Alexa, C [0000-0003-0922-7669], Alexopoulos, T [0000-0002-8977-279X], Alfonsi, A [0000-0001-7406-4531], Alfonsi, F [0000-0002-0966-0211], Alhroob, M [0000-0001-7569-7111], Ali, B [0000-0001-8653-5556], Ali, S [0000-0001-5216-3133], Aliev, M [0000-0002-9012-3746], Alimonti, G [0000-0002-7128-9046], Alkakhi, W [0000-0001-9355-4245], Allaire, C [0000-0003-4745-538X], Allbrooke, BMM [0000-0002-5738-2471], Allport, PP [0000-0001-7303-2570], Aloisio, A [0000-0002-3883-6693], Alonso, F [0000-0001-9431-8156], Alpigiani, C [0000-0002-7641-5814], Alvarez Estevez, M [0000-0002-8181-6532], Alviggi, MG [0000-0003-0026-982X], Aly, M [0000-0003-3043-3715], Amaral Coutinho, Y [0000-0002-1798-7230], Ambler, A [0000-0003-2184-3480], Ames, CG [0000-0002-2126-4246], Amidei, D [0000-0002-6814-0355], Amor Dos Santos, SP [0000-0001-7566-6067], Amoroso, S [0000-0001-5450-0447], Amos, KR [0000-0003-1757-5620], Ananiev, V [0000-0003-3649-7621], Anastopoulos, C [0000-0003-1587-5830], Andeen, T [0000-0002-4413-871X], Anders, JK [0000-0002-1846-0262], Andrean, SY [0000-0002-9766-2670], Andreazza, A [0000-0001-5161-5759], Angelidakis, S [0000-0002-8274-6118], Angerami, A [0000-0001-7834-8750], Anisenkov, AV [0000-0002-7201-5936], Annovi, A [0000-0002-4649-4398], Antel, C [0000-0001-9683-0890], Anthony, MT [0000-0002-5270-0143], Antipov, E [0000-0002-6678-7665], Antonelli, M [0000-0002-2293-5726], Antrim, DJA [0000-0001-8084-7786], Anulli, F [0000-0003-2734-130X], Aoki, M [0000-0001-7498-0097], Aoki, T [0000-0002-6618-5170], Aparisi Pozo, JA [0000-0001-7401-4331], Aparo, MA [0000-0003-4675-7810], Aperio Bella, L [0000-0003-3942-1702], Appelt, C [0000-0003-1205-6784], Aranzabal, N [0000-0001-9013-2274], Araujo Ferraz, V [0000-0003-1177-7563], Arcangeletti, C [0000-0001-8648-2896], Arce, ATH [0000-0002-7255-0832], Arena, E [0000-0001-5970-8677], Arguin, JF [0000-0003-0229-3858], Apollo - University of Cambridge Repository
Rok vydání: 2023
Předmět:
Popis: In a special run of the LHC with $$\beta ^{\star } = 2.5$$ β ⋆ = 2.5 km, proton–proton elastic-scattering events were recorded at $$\sqrt{s} = 13$$ s = 13 TeV with an integrated luminosity of $$340~\upmu {\text {b}}^{-1}$$ 340 μ b - 1 using the ALFA subdetector of ATLAS in 2016. The elastic cross section was measured differentially in the Mandelstam t variable in the range from $$-t = 2.5 \cdot 10^{-4}$$ - t = 2.5 · 10 - 4 GeV$$^{2}$$ 2 to $$-t = 0.46$$ - t = 0.46 GeV$$^{2}$$ 2 using 6.9 million elastic-scattering candidates. This paper presents measurements of the total cross section $$\sigma _{\text {tot}}$$ σ tot , parameters of the nuclear slope, and the $$\rho $$ ρ -parameter defined as the ratio of the real part to the imaginary part of the elastic-scattering amplitude in the limit $$t \rightarrow 0$$ t → 0 . These parameters are determined from a fit to the differential elastic cross section using the optical theorem and different parameterizations of the t-dependence. The results for $$\sigma _{\text {tot}}$$ σ tot and $$\rho $$ ρ are $$\begin{aligned} \sigma _{\text {tot}}(pp\rightarrow X) = 104.7 \pm 1.1 \; \text{ mb },\quad \rho = 0.098 \pm 0.011 . \end{aligned}$$ σ tot ( p p → X ) = 104.7 ± 1.1 mb , ρ = 0.098 ± 0.011 . The uncertainty in $$\sigma _{\text {tot}}$$ σ tot is dominated by the luminosity measurement, and in $$\rho $$ ρ by imperfect knowledge of the detector alignment and by modelling of the nuclear amplitude.
Databáze: OpenAIRE
Externí odkaz: