Measurement of the cross section for electromagnetic dissociation with neutron emission in Pb-Pb collisions at sqrt[s(NN)] = 2.76 TeV.
The first measurement of neutron emission in electromagnetic dissociation of ^{208}Pb nuclei at the LHC is presented. The measurement is performed using the neutron zero degree calorimeters of the ALICE experiment, which detect neutral particles close to beam rapidity. The measured cross sections of single and mutual electromagnetic dissociation of Pb nuclei at sqrt[s(NN)]=2.76 TeV with neutron emission are σ(singleEMD)=187.4 ± 0.2(stat)(-11.2)(+13.2) (syst) b and σ(mutualEMD) = 5.7 ± 0.1(stat) ± 0.4(syst) b, respectively. The experimental results are compared to the predictions from a relativistic electromagnetic dissociation model.
Lawrence Livermore National Laboratory, Livermore, California, USA.
B
B
Abelev
J
J
Adam
D
D
Adamová
A M
AM
Adare
M M
MM
Aggarwal
G
G
Aglieri Rinella
A G
AG
Agocs
A
A
Agostinelli
S
S
Aguilar Salazar
Z
Z
Ahammed
A
A
Ahmad Masoodi
N
N
Ahmad
S U
SU
Ahn
A
A
Akindinov
D
D
Aleksandrov
B
B
Alessandro
R
R
Alfaro Molina
A
A
Alici
A
A
Alkin
E
E
Almaráz Aviña
J
J
Alme
T
T
Alt
V
V
Altini
S
S
Altinpinar
I
I
Altsybeev
C
C
Andrei
A
A
Andronic
V
V
Anguelov
J
J
Anielski
T
T
Antičić
F
F
Antinori
P
P
Antonioli
L
L
Aphecetche
H
H
Appelshäuser
N
N
Arbor
S
S
Arcelli
A
A
Arend
N
N
Armesto
R
R
Arnaldi
T
T
Aronsson
I C
IC
Arsene
M
M
Arslandok
A
A
Augustinus
R
R
Averbeck
T C
TC
Awes
J
J
Aystö
M D
MD
Azmi
M
M
Bach
A
A
Badalà
Y W
YW
Baek
R
R
Bailhache
R
R
Bala
R
R
Baldini Ferroli
A
A
Baldisseri
A
A
Baldit
F
F
Baltasar Dos Santos Pedrosa
J
J
Bán
R C
RC
Baral
R
R
Barbera
F
F
Barile
G G
GG
Barnaföldi
L S
LS
Barnby
V
V
Barret
J
J
Bartke
M
M
Basile
N
N
Bastid
S
S
Basu
B
B
Bathen
G
G
Batigne
B
B
Batyunya
C
C
Baumann
I G
IG
Bearden
H
H
Beck
I
I
Belikov
F
F
Bellini
R
R
Bellwied
E
E
Belmont-Moreno
G
G
Bencedi
S
S
Beole
I
I
Berceanu
A
A
Bercuci
Y
Y
Berdnikov
D
D
Berenyi
D
D
Berzano
L
L
Betev
A
A
Bhasin
A K
AK
Bhati
J
J
Bhom
L
L
Bianchi
N
N
Bianchi
C
C
Bianchin
J
J
Bielčík
J
J
Bielčíková
A
A
Bilandzic
S
S
Bjelogrlic
F
F
Blanco
F
F
Blanco
D
D
Blau
C
C
Blume
N
N
Bock
A
A
Bogdanov
H
H
Bøggild
M
M
Bogolyubsky
L
L
Boldizsár
M
M
Bombara
J
J
Book
H
H
Borel
A
A
Borissov
S
S
Bose
F
F
Bossú
M
M
Botje
S
S
Böttger
B
B
Boyer
E
E
Braidot
P
P
Braun-Munzinger
M
M
Bregant
T
T
Breitner
T A
TA
Browning
M
M
Broz
R
R
Brun
E
E
Bruna
G E
GE
Bruno
D
D
Budnikov
H
H
Buesching
S
S
Bufalino
K
K
Bugaiev
O
O
Busch
Z
Z
Buthelezi
D
D
Caballero Orduna
D
D
Caffarri
X
X
Cai
H
H
Caines
E
E
Calvo Villar
P
P
Camerini
V
V
Canoa Roman
G
G
Cara Romeo
F
F
Carena
W
W
Carena
F
F
Carminati
A
A
Casanova Díaz
J
J
Castillo Castellanos
E A R
EA
Casula
V
V
Catanescu
C
C
Cavicchioli
C
C
Ceballos Sanchez
J
J
Cepila
P
P
Cerello
B
B
Chang
S
S
Chapeland
J L
JL
Charvet
S
S
Chattopadhyay
S
S
Chattopadhyay
I
I
Chawla
M
M
Cherney
C
C
Cheshkov
B
B
Cheynis
E
E
Chiavassa
V
V
Chibante Barroso
D D
DD
Chinellato
P
P
Chochula
M
M
Chojnacki
S
S
Choudhury
P
P
Christakoglou
C H
CH
Christensen
P
P
Christiansen
T
T
Chujo
S U
SU
Chung
C
C
Cicalo
L
L
Cifarelli
F
F
Cindolo
J
J
Cleymans
F
F
Coccetti
F
F
Colamaria
D
D
Colella
G
G
Conesa Balbastre
Z
Z
Conesa Del Valle
P
P
Constantin
G
G
Contin
J G
JG
Contreras
T M
TM
Cormier
Y
Y
Corrales Morales
I
I
Cortés Maldonado
P
P
Cortese
M R
MR
Cosentino
F
F
Costa
M E
ME
Cotallo
P
P
Crochet
E
E
Cruz Alaniz
E
E
Cuautle
L
L
Cunqueiro
G D
GD
Erasmo
A
A
Dainese
H H
HH
Dalsgaard
A
A
Danu
D
D
Das
I
I
Das
K
K
Das
A
A
Dash
S
S
Dash
S
S
De
G O V
GO
de Barros
A
A
De Caro
G
G
de Cataldo
J
J
de Cuveland
A
A
De Falco
D
D
De Gruttola
N
N
De Marco
S
S
De Pasquale
R
R
de Rooij
E
E
Del Castillo Sanchez
H
H
Delagrange
A
A
Deloff
V
V
Demanov
E
E
Dénes
A
A
Deppman
D
D
Di Bari
C
C
Di Giglio
S
S
Di Liberto
A
A
Di Mauro
P
P
Di Nezza
M A
MA
Diaz Corchero
T
T
Dietel
R
R
Divià
O
O
Djuvsland
A
A
Dobrin
T
T
Dobrowolski
I
I
Domínguez
B
B
Dönigus
O
O
Dordic
O
O
Driga
A K
AK
Dubey
L
L
Ducroux
P
P
Dupieux
A K
AK
Dutta Majumdar
M R
MR
Dutta Majumdar
D
D
Elia
D
D
Emschermann
H
H
Engel
H A
HA
Erdal
B
B
Espagnon
M
M
Estienne
S
S
Esumi
D
D
Evans
G
G
Eyyubova
D
D
Fabris
J
J
Faivre
D
D
Falchieri
A
A
Fantoni
M
M
Fasel
R
R
Fearick
A
A
Fedunov
D
D
Fehlker
L
L
Feldkamp
D
D
Felea
B
B
Fenton-Olsen
G
G
Feofilov
A
A
Fernández Téllez
A
A
Ferretti
R
R
Ferretti
J
J
Figiel
M A S
MA
Figueredo
S
S
Filchagin
D
D
Finogeev
F M
FM
Fionda
E M
EM
Fiore
M
M
Floris
S
S
Foertsch
P
P
Foka
S
S
Fokin
E
E
Fragiacomo
M
M
Fragkiadakis
U
U
Frankenfeld
U
U
Fuchs
C
C
Furget
M
M
Fusco Girard
J J
JJ
Gaardhøje
M
M
Gagliardi
A
A
Gago
M
M
Gallio
D R
DR
Gangadharan
P
P
Ganoti
C
C
Garabatos
E
E
Garcia-Solis
I
I
Garishvili
J
J
Gerhard
M
M
Germain
C
C
Geuna
A
A
Gheata
M
M
Gheata
B
B
Ghidini
P
P
Ghosh
P
P
Gianotti
M R
MR
Girard
P
P
Giubellino
E
E
Gladysz-Dziadus
P
P
Glässel
R
R
Gomez
E G
EG
Ferreiro
L H
LH
González-Trueba
P
P
González-Zamora
S
S
Gorbunov
A
A
Goswami
S
S
Gotovac
V
V
Grabski
L K
LK
Graczykowski
R
R
Grajcarek
A
A
Grelli
A
A
Grigoras
C
C
Grigoras
V
V
Grigoriev
A
A
Grigoryan
S
S
Grigoryan
B
B
Grinyov
N
N
Grion
J F
JF
Grosse-Oetringhaus
J-Y
JY
Grossiord
R
R
Grosso
F
F
Guber
R
R
Guernane
C
C
Guerra Gutierrez
B
B
Guerzoni
M
M
Guilbaud
K
K
Gulbrandsen
T
T
Gunji
A
A
Gupta
R
R
Gupta
H
H
Gutbrod
O
O
Haaland
C
C
Hadjidakis
M
M
Haiduc
H
H
Hamagaki
G
G
Hamar
L D
LD
Hanratty
A
A
Hansen
Z
Z
Harmanova
J W
JW
Harris
M
M
Hartig
D
D
Hasegan
D
D
Hatzifotiadou
A
A
Hayrapetyan
S T
ST
Heckel
M
M
Heide
H
H
Helstrup
A
A
Herghelegiu
G
G
Herrera Corral
N
N
Herrmann
B A
BA
Hess
K F
KF
Hetland
B
B
Hicks
P T
PT
Hille
B
B
Hippolyte
T
T
Horaguchi
Y
Y
Hori
P
P
Hristov
I
I
Hřivnáčová
M
M
Huang
T J
TJ
Humanic
D S
DS
Hwang
R
R
Ichou
R
R
Ilkaev
I
I
Ilkiv
M
M
Inaba
E
E
Incani
G M
GM
Innocenti
M
M
Ippolitov
M
M
Irfan
C
C
Ivan
A
A
Ivanov
M
M
Ivanov
V
V
Ivanov
O
O
Ivanytskyi
A
A
Jachołkowski
P M
PM
Jacobs
L
L
Jancurová
H J
HJ
Jang
S
S
Jangal
M A
MA
Janik
R
R
Janik
P H S Y
PH
Jayarathna
S
S
Jena
D M
DM
Jha
R T
RT
Jimenez Bustamante
L
L
Jirden
P G
PG
Jones
H
H
Jung
A
A
Jusko
V
V
Kakoyan
S
S
Kalcher
P
P
Kaliňák
M
M
Kalisky
T
T
Kalliokoski
A
A
Kalweit
K
K
Kanaki
J H
JH
Kang
V
V
Kaplin
A
A
Karasu Uysal
O
O
Karavichev
T
T
Karavicheva
E
E
Karpechev
A
A
Kazantsev
U
U
Kebschull
R
R
Keidel
M M
MM
Khan
S A
SA
Khan
A
A
Khanzadeev
Y
Y
Kharlov
B
B
Kileng
B
B
Kim
D J
DJ
Kim
D W
DW
Kim
J H
JH
Kim
J S
JS
Kim
M
M
Kim
S
S
Kim
S H
SH
Kim
T
T
Kim
S
S
Kirsch
I
I
Kisel
S
S
Kiselev
A
A
Kisiel
J L
JL
Klay
J
J
Klein
C
C
Klein-Bösing
M
M
Kliemant
A
A
Kluge
M L
ML
Knichel
A G
AG
Knospe
K
K
Koch
M K
MK
Köhler
A
A
Kolojvari
V
V
Kondratiev
N
N
Kondratyeva
A
A
Konevskikh
A
A
Korneev
R
R
Kour
M
M
Kowalski
S
S
Kox
G
G
Koyithatta Meethaleveedu
J
J
Kral
I
I
Králik
F
F
Kramer
I
I
Kraus
T
T
Krawutschke
M
M
Krelina
M
M
Kretz
M
M
Krivda
F
F
Krizek
M
M
Krus
E
E
Kryshen
M
M
Krzewicki
Y
Y
Kucheriaev
C
C
Kuhn
P G
PG
Kuijer
P
P
Kurashvili
A
A
Kurepin
A B
AB
Kurepin
A
A
Kuryakin
S
S
Kushpil
V
V
Kushpil
M J
MJ
Kweon
Y
Y
Kwon
S L
SL
La Pointe
P
P
La Rocca
P
P
Ladrón de Guevara
I
I
Lakomov
R
R
Langoy
C
C
Lara
A
A
Lardeux
C
C
Lazzeroni
Y
Y
Le Bornec
R
R
Lea
M
M
Lechman
K S
KS
Lee
S C
SC
Lee
F
F
Lefèvre
J
J
Lehnert
L
L
Leistam
R C
RC
Lemmon
M
M
Lenhardt
V
V
Lenti
I
I
León Monzón
H
H
León Vargas
M
M
Leoncino
P
P
Lévai
J
J
Lien
R
R
Lietava
S
S
Lindal
V
V
Lindenstruth
C
C
Lippmann
M A
MA
Lisa
L
L
Liu
P I
PI
Loenne
V R
VR
Loggins
V
V
Loginov
S
S
Lohn
D
D
Lohner
C
C
Loizides
K K
KK
Loo
X
X
Lopez
E
E
López Torres
G
G
Løvhøiden
X-G
XG
Lu
P
P
Luettig
M
M
Lunardon
J
J
Luo
G
G
Luparello
L
L
Luquin
C
C
Luzzi
R
R
Ma
A
A
Maevskaya
M
M
Mager
D P
DP
Mahapatra
A
A
Maire
D
D
Mal'kevich
M
M
Malaev
I
I
Maldonado Cervantes
L
L
Malinina
P
P
Malzacher
A
A
Mamonov
L
L
Manceau
V
V
Manko
F
F
Manso
V
V
Manzari
Y
Y
Mao
M
M
Marchisone
J
J
Mareš
G V
GV
Margagliotti
A
A
Margotti
A
A
Marín
C A
CA
Marin Tobon
C
C
Markert
I
I
Martashvili
P
P
Martinengo
M I
MI
Martínez
A
A
Martínez Davalos
G
G
Martínez García
Y
Y
Martynov
A
A
Mas
S
S
Masciocchi
M
M
Masera
A
A
Masoni
M
M
Mastromarco
A
A
Mastroserio
Z L
ZL
Matthews
A
A
Matyja
D
D
Mayani
C
C
Mayer
J
J
Mazer
M A
MA
Mazzoni
F
F
Meddi
A
A
Menchaca-Rocha
J
J
Mercado Pérez
M
M
Meres
Y
Y
Miake
L
L
Milano
J
J
Milosevic
A
A
Mischke
A N
AN
Mishra
D
D
Miśkowiec
C
C
Mitu
J
J
Mlynarz
A K
AK
Mohanty
B
B
Mohanty
L
L
Molnar
L
L
Montaño Zetina
M
M
Monteno
E
E
Montes
T
T
Moon
M
M
Morando
D A
DA
Moreira De Godoy
S
S
Moretto
A
A
Morsch
V
V
Muccifora
E
E
Mudnic
S
S
Muhuri
M
M
Mukherjee
H
H
Müller
M G
MG
Munhoz
L
L
Musa
A
A
Musso
B K
BK
Nandi
R
R
Nania
E
E
Nappi
C
C
Nattrass
N P
NP
Naumov
S
S
Navin
T K
TK
Nayak
S
S
Nazarenko
G
G
Nazarov
A
A
Nedosekin
M
M
Nicassio
B S
BS
Nielsen
T
T
Niida
S
S
Nikolaev
V
V
Nikolic
S
S
Nikulin
V
V
Nikulin
B S
BS
Nilsen
M S
MS
Nilsson
F
F
Noferini
P
P
Nomokonov
G
G
Nooren
N
N
Novitzky
A
A
Nyanin
A
A
Nyatha
C
C
Nygaard
J
J
Nystrand
H
H
Oeschler
S
S
Oh
S K
SK
Oh
J
J
Oleniacz
C
C
Oppedisano
A
A
Ortiz Velasquez
G
G
Ortona
A
A
Oskarsson
J
J
Otwinowski
K
K
Oyama
Y
Y
Pachmayer
M
M
Pachr
F
F
Padilla
P
P
Pagano
G
G
Paić
F
F
Painke
C
C
Pajares
S
S
Pal
S K
SK
Pal
A
A
Palaha
A
A
Palmeri
V
V
Papikyan
G S
GS
Pappalardo
W J
WJ
Park
A
A
Passfeld
D I
DI
Patalakha
V
V
Paticchio
A
A
Pavlinov
T
T
Pawlak
T
T
Peitzmann
H
H
Pereira Da Costa
E
E
Pereira De Oliveira Filho
D
D
Peresunko
C E
CE
Pérez Lara
E
E
Perez Lezama
D
D
Perini
D
D
Perrino
W
W
Peryt
A
A
Pesci
V
V
Peskov
Y
Y
Pestov
V
V
Petráček
M
M
Petran
M
M
Petris
P
P
Petrov
M
M
Petrovici
C
C
Petta
S
S
Piano
A
A
Piccotti
M
M
Pikna
P
P
Pillot
O
O
Pinazza
L
L
Pinsky
N
N
Pitz
F
F
Piuz
D B
DB
Piyarathna
M
M
Płoskoń
J
J
Pluta
T
T
Pocheptsov
S
S
Pochybova
P L M
PL
Podesta-Lerma
M G
MG
Poghosyan
B
B
Polichtchouk
A
A
Pop
S
S
Porteboeuf-Houssais
V
V
Pospíšil
B
B
Potukuchi
S K
SK
Prasad
R
R
Preghenella
F
F
Prino
C A
CA
Pruneau
I
I
Pshenichnov
S
S
Puchagin
G
G
Puddu
J
J
Pujol Teixido
A
A
Pulvirenti
V
V
Punin
M
M
Putiš
J
J
Putschke
E
E
Quercigh
H
H
Qvigstad
A
A
Rachevski
A
A
Rademakers
S
S
Radomski
T S
TS
Räihä
J
J
Rak
A
A
Rakotozafindrabe
L
L
Ramello
A
A
Ramírez Reyes
R
R
Raniwala
S
S
Raniwala
S S
SS
Räsänen
B T
BT
Rascanu
D
D
Rathee
K F
KF
Read
J S
JS
Real
K
K
Redlich
P
P
Reichelt
M
M
Reicher
R
R
Renfordt
A R
AR
Reolon
A
A
Reshetin
F
F
Rettig
J-P
JP
Revol
K
K
Reygers
L
L
Riccati
R A
RA
Ricci
T
T
Richert
M
M
Richter
P
P
Riedler
W
W
Riegler
F
F
Riggi
B
B
Rodrigues Fernandes Rabacal
M
M
Rodríguez Cahuantzi
A
A
Rodriguez Manso
K
K
Røed
D
D
Rohr
D
D
Röhrich
R
R
Romita
F
F
Ronchetti
P
P
Rosnet
S
S
Rossegger
A
A
Rossi
F
F
Roukoutakis
C
C
Roy
P
P
Roy
A J
AJ
Rubio Montero
R
R
Rui
E
E
Ryabinkin
A
A
Rybicki
S
S
Sadovsky
K
K
Safařík
R
R
Sahoo
P K
PK
Sahu
J
J
Saini
H
H
Sakaguchi
S
S
Sakai
D
D
Sakata
C A
CA
Salgado
J
J
Salzwedel
S
S
Sambyal
V
V
Samsonov
X
X
Sanchez Castro
L
L
Sándor
A
A
Sandoval
M
M
Sano
S
S
Sano
R
R
Santo
R
R
Santoro
J
J
Sarkamo
E
E
Scapparone
F
F
Scarlassara
R P
RP
Scharenberg
C
C
Schiaua
R
R
Schicker
C
C
Schmidt
H R
HR
Schmidt
S
S
Schreiner
S
S
Schuchmann
J
J
Schukraft
Y
Y
Schutz
K
K
Schwarz
K
K
Schweda
G
G
Scioli
E
E
Scomparin
P A
PA
Scott
R
R
Scott
G
G
Segato
I
I
Selyuzhenkov
S
S
Senyukov
J
J
Seo
S
S
Serci
E
E
Serradilla
A
A
Sevcenco
I
I
Sgura
A
A
Shabetai
G
G
Shabratova
R
R
Shahoyan
N
N
Sharma
S
S
Sharma
K
K
Shigaki
M
M
Shimomura
K
K
Shtejer
Y
Y
Sibiriak
M
M
Siciliano
E
E
Sicking
S
S
Siddhanta
T
T
Siemiarczuk
D
D
Silvermyr
C
C
Silvestre
G
G
Simonetti
R
R
Singaraju
R
R
Singh
S
S
Singha
B C
BC
Sinha
T
T
Sinha
B
B
Sitar
M
M
Sitta
T B
TB
Skaali
K
K
Skjerdal
R
R
Smakal
N
N
Smirnov
R J M
RJ
Snellings
C
C
Søgaard
R
R
Soltz
H
H
Son
J
J
Song
M
M
Song
C
C
Soos
F
F
Soramel
I
I
Sputowska
M
M
Spyropoulou-Stassinaki
B K
BK
Srivastava
J
J
Stachel
I
I
Stan
G
G
Stefanek
G
G
Stefanini
T
T
Steinbeck
M
M
Steinpreis
E
E
Stenlund
G
G
Steyn
J H
JH
Stiller
D
D
Stocco
M
M
Stolpovskiy
K
K
Strabykin
P
P
Strmen
A A P
AA
Suaide
M A
MA
Subieta Vásquez
T
T
Sugitate
C
C
Suire
M
M
Sukhorukov
R
R
Sultanov
M
M
Sumbera
T
T
Susa
A
A
Szanto de Toledo
I
I
Szarka
A
A
Szczepankiewicz
A
A
Szostak
C
C
Tagridis
J
J
Takahashi
J D
JD
Tapia Takaki
A
A
Tauro
G
G
Tejeda Muñoz
A
A
Telesca
C
C
Terrevoli
J
J
Thäder
D
D
Thomas
R
R
Tieulent
A R
AR
Timmins
D
D
Tlusty
A
A
Toia
H
H
Torii
F
F
Tosello
W H
WH
Trzaska
T
T
Tsuji
A
A
Tumkin
R
R
Turrisi
T S
TS
Tveter
J
J
Ulery
K
K
Ullaland
J
J
Ulrich
A
A
Uras
J
J
Urbán
G M
GM
Urciuoli
G L
GL
Usai
M
M
Vajzer
M
M
Vala
L
L
Valencia Palomo
S
S
Vallero
N
N
van der Kolk
M
M
van Leeuwen
P
P
Vande Vyvre
L
L
Vannucci
A
A
Vargas
R
R
Varma
M
M
Vasileiou
A
A
Vasiliev
V
V
Vechernin
M
M
Veldhoen
M
M
Venaruzzo
E
E
Vercellin
S
S
Vergara
R
R
Vernet
M
M
Verweij
L
L
Vickovic
G
G
Viesti
O
O
Vikhlyantsev
Z
Z
Vilakazi
O
O
Villalobos Baillie
A
A
Vinogradov
L
L
Vinogradov
Y
Y
Vinogradov
T
T
Virgili
Y P
YP
Viyogi
A
A
Vodopyanov
K
K
Voloshin
S
S
Voloshin
G
G
Volpe
B
B
von Haller
D
D
Vranic
G
G
Ovrebekk
J
J
Vrláková
B
B
Vulpescu
A
A
Vyushin
B
B
Wagner
V
V
Wagner
R
R
Wan
D
D
Wang
M
M
Wang
Y
Y
Wang
Y
Y
Wang
K
K
Watanabe
J P
JP
Wessels
U
U
Westerhoff
J
J
Wiechula
J
J
Wikne
M
M
Wilde
A
A
Wilk
G
G
Wilk
M C S
MC
Williams
B
B
Windelband
L
L
Xaplanteris Karampatsos
C G
CG
Yaldo
H
H
Yang
S
S
Yang
S
S
Yasnopolskiy
J
J
Yi
Z
Z
Yin
I-K
IK
Yoo
J
J
Yoon
W
W
Yu
X
X
Yuan
I
I
Yushmanov
C
C
Zach
C
C
Zampolli
S
S
Zaporozhets
A
A
Zarochentsev
P
P
Závada
N
N
Zaviyalov
H
H
Zbroszczyk
P
P
Zelnicek
I S
IS
Zgura
M
M
Zhalov
H
H
Zhang
X
X
Zhang
D
D
Zhou
F
F
Zhou
Y
Y
Zhou
J
J
Zhu
X
X
Zhu
A
A
Zichichi
A
A
Zimmermann
G
G
Zinovjev
Y
Y
Zoccarato
M
M
Zynovyev